Loading libraries

library(GEOquery)
Loading required package: Biobase
Loading required package: BiocGenerics

Attaching package: ‘BiocGenerics’

The following objects are masked from ‘package:stats’:

    IQR, mad, sd, var, xtabs

The following objects are masked from ‘package:base’:

    anyDuplicated, append, as.data.frame, basename,
    cbind, colnames, dirname, do.call, duplicated, eval,
    evalq, Filter, Find, get, grep, grepl, intersect,
    is.unsorted, lapply, Map, mapply, match, mget,
    order, paste, pmax, pmax.int, pmin, pmin.int,
    Position, rank, rbind, Reduce, rownames, sapply,
    setdiff, sort, table, tapply, union, unique,
    unsplit, which.max, which.min

Welcome to Bioconductor

    Vignettes contain introductory material; view with
    'browseVignettes()'. To cite Bioconductor, see
    'citation("Biobase")', and for packages
    'citation("pkgname")'.
library(oligo)
Loading required package: oligoClasses
Welcome to oligoClasses version 1.56.0
Loading required package: Biostrings
Loading required package: S4Vectors
Loading required package: stats4

Attaching package: ‘S4Vectors’

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    expand.grid, I, unname

Loading required package: IRanges
Loading required package: XVector
Loading required package: GenomeInfoDb

Attaching package: ‘Biostrings’

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    strsplit

================================================================
Welcome to oligo version 1.58.0
================================================================
library(sva)
Loading required package: mgcv
Loading required package: nlme

Attaching package: ‘nlme’

The following object is masked from ‘package:Biostrings’:

    collapse

The following object is masked from ‘package:IRanges’:

    collapse

This is mgcv 1.8-38. For overview type 'help("mgcv-package")'.
Loading required package: genefilter
Loading required package: BiocParallel
library(tidyverse)
Registered S3 methods overwritten by 'dbplyr':
  method         from
  print.tbl_lazy     
  print.tbl_sql      
── Attaching packages ─────────────────────── tidyverse 1.3.1 ──
✓ ggplot2 3.3.5     ✓ purrr   0.3.4
✓ tibble  3.1.6     ✓ dplyr   1.0.7
✓ tidyr   1.1.4     ✓ stringr 1.4.0
✓ readr   2.1.0     ✓ forcats 0.5.1
── Conflicts ────────────────────────── tidyverse_conflicts() ──
x dplyr::collapse()   masks nlme::collapse(), Biostrings::collapse(), IRanges::collapse()
x dplyr::combine()    masks Biobase::combine(), BiocGenerics::combine()
x purrr::compact()    masks XVector::compact()
x dplyr::desc()       masks IRanges::desc()
x tidyr::expand()     masks S4Vectors::expand()
x dplyr::filter()     masks stats::filter()
x dplyr::first()      masks S4Vectors::first()
x dplyr::lag()        masks stats::lag()
x ggplot2::Position() masks BiocGenerics::Position(), base::Position()
x purrr::reduce()     masks IRanges::reduce()
x dplyr::rename()     masks S4Vectors::rename()
x dplyr::slice()      masks XVector::slice(), IRanges::slice()
x readr::spec()       masks genefilter::spec()
x dplyr::summarize()  masks oligo::summarize()
library(ggsci)
library(factoextra)
Welcome! Want to learn more? See two factoextra-related books at https://goo.gl/ve3WBa
library(pheatmap)
library(dendextend)

---------------------
Welcome to dendextend version 1.15.2
Type citation('dendextend') for how to cite the package.

Type browseVignettes(package = 'dendextend') for the package vignette.
The github page is: https://github.com/talgalili/dendextend/

Suggestions and bug-reports can be submitted at: https://github.com/talgalili/dendextend/issues
You may ask questions at stackoverflow, use the r and dendextend tags: 
     https://stackoverflow.com/questions/tagged/dendextend

    To suppress this message use:  suppressPackageStartupMessages(library(dendextend))
---------------------


Attaching package: ‘dendextend’

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    nnodes

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    cutree
library(caret)
Loading required package: lattice

Attaching package: ‘caret’

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    lift
library(RColorBrewer)
library(viridis)
Loading required package: viridisLite
library(UpSetR)

Attaching package: ‘UpSetR’

The following object is masked from ‘package:lattice’:

    histogram
library(ComplexUpset)

Attaching package: ‘ComplexUpset’

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    upset

Custom functions

# given a matrix, perform min-max scaling on its columns
min_max_mat <- function(mat){
  mat_rescaled <- apply(mat, 2, function(v){
    v_range <- range(v)
    names(v_range) <- c("minimum", "maximum")
    range_difference <- v_range["maximum"] - v_range["minimum"]
    rescaled <- (v - v_range["minimum"])/range_difference
    return(rescaled)
  })
  return(mat_rescaled)
}

Getting data from GEOquery

# geodata <- GEOquery::getGEO(GEO = "GSE76275", destdir = "./tempfiles")
# geodata <- GEOquery::getGEO(filename = "./tempfiles/GSE76275_series_matrix.txt.gz")
# saveRDS(geodata, "geodata.RDS")
geodata <- readRDS("geodata.RDS")
# mdata <- geodata %>% 
#   pluck(1) %>% 
#   phenoData() %>%
#   pData() %>% as_tibble()
# feature_data <- geodata %>% 
#   pluck(1) %>% 
#   featureData()
  
# write_csv(mdata, "raw_mdata.csv")
mdata <- read_csv("raw_mdata.csv")
Rows: 265 Columns: 69
── Column specification ────────────────────────────────────────
Delimiter: ","
chr (62): title, geo_accession, status, submission_date, las...
dbl  (6): channel_count, taxid_ch1, contact_zip/postal_code,...
lgl  (1): growth_protocol_ch1

ℹ Use `spec()` to retrieve the full column specification for this data.
ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
# saveRDS(feature_data, "featureData.RDS")
# feature_data <- readRDS("featureData.RDS")

Inspecting and cleaning the metadata

mdata %>% 
  glimpse()
Rows: 265
Columns: 23
$ title                                <chr> "S1-H10", "S1-H14…
$ submission_date                      <chr> "Dec 17 2015", "D…
$ last_update_date                     <chr> "Dec 18 2015", "D…
$ geo_accession                        <chr> "GSM1974566", "GS…
$ `age (years):ch1`                    <dbl> NA, 41, 55, 55, 6…
$ `ajcc stage (7th edition, 2010):ch1` <chr> "T2N1M0", "T1N0M0…
$ `body mass index:ch1`                <dbl> 32, 29, NA, 31, 3…
$ `er:ch1`                             <chr> "Negative", "Nega…
$ `gender:ch1`                         <chr> "Female", "Female…
$ `her2:ch1`                           <chr> "Negative", "Nega…
$ `histology group:ch1`                <chr> "Infiltrating Duc…
$ `histology:ch1`                      <chr> "Infiltrating Duc…
$ `menopausal status:ch1`              <chr> "Post-Menopausal"…
$ `metastases:ch1`                     <chr> "No mets", "No me…
$ `positive nodes:ch1`                 <chr> "1 - 3", "0", "0"…
$ `pr:ch1`                             <chr> "Negative", "Nega…
$ `race:ch1`                           <chr> "Caucasian", "Cau…
$ `set:ch1`                            <chr> "Validation TN", …
$ `tissue:ch1`                         <chr> "Breast cancer", …
$ `tnbc subtype:ch1`                   <chr> "Mesenchymal (MES…
$ `triple-negative status:ch1`         <chr> "TN", "TN", "TN",…
$ `tumor grade:ch1`                    <chr> NA, "Poorly Diffe…
$ `tumor size:ch1`                     <chr> "2 - 5 cm", "<=2c…
mdata <- mdata %>% 
  select(title, contains("date"), geo_accession, contains(":ch1"))

colnames(mdata)
 [1] "title"                             
 [2] "submission_date"                   
 [3] "last_update_date"                  
 [4] "geo_accession"                     
 [5] "age (years):ch1"                   
 [6] "ajcc stage (7th edition, 2010):ch1"
 [7] "body mass index:ch1"               
 [8] "er:ch1"                            
 [9] "gender:ch1"                        
[10] "her2:ch1"                          
[11] "histology group:ch1"               
[12] "histology:ch1"                     
[13] "menopausal status:ch1"             
[14] "metastases:ch1"                    
[15] "positive nodes:ch1"                
[16] "pr:ch1"                            
[17] "race:ch1"                          
[18] "set:ch1"                           
[19] "tissue:ch1"                        
[20] "tnbc subtype:ch1"                  
[21] "triple-negative status:ch1"        
[22] "tumor grade:ch1"                   
[23] "tumor size:ch1"                    
  
cnames <- colnames(mdata)
cnames_processed <- str_split(cnames, pattern = ":") %>% 
  map_chr(~{.x[[1]]}) %>% 
  str_replace_all(" ", "_") %>% 
  str_replace_all("-", "_") %>% 
  str_remove_all("\\(|\\)|,")

cnames_processed
 [1] "title"                       "submission_date"            
 [3] "last_update_date"            "geo_accession"              
 [5] "age_years"                   "ajcc_stage_7th_edition_2010"
 [7] "body_mass_index"             "er"                         
 [9] "gender"                      "her2"                       
[11] "histology_group"             "histology"                  
[13] "menopausal_status"           "metastases"                 
[15] "positive_nodes"              "pr"                         
[17] "race"                        "set"                        
[19] "tissue"                      "tnbc_subtype"               
[21] "triple_negative_status"      "tumor_grade"                
[23] "tumor_size"                 
colnames(mdata) <- cnames_processed
rm(cnames, cnames_processed)
glimpse(mdata)
Rows: 265
Columns: 23
$ title                       <chr> "S1-H10", "S1-H14", "S1-H1…
$ submission_date             <chr> "Dec 17 2015", "Dec 17 201…
$ last_update_date            <chr> "Dec 18 2015", "Dec 18 201…
$ geo_accession               <chr> "GSM1974566", "GSM1974567"…
$ age_years                   <dbl> NA, 41, 55, 55, 65, 40, 66…
$ ajcc_stage_7th_edition_2010 <chr> "T2N1M0", "T1N0M0", "T2N0M…
$ body_mass_index             <dbl> 32, 29, NA, 31, 38, 22, 22…
$ er                          <chr> "Negative", "Negative", "N…
$ gender                      <chr> "Female", "Female", "Femal…
$ her2                        <chr> "Negative", "Negative", "N…
$ histology_group             <chr> "Infiltrating Ductal Carci…
$ histology                   <chr> "Infiltrating Ductal Carci…
$ menopausal_status           <chr> "Post-Menopausal", "Post-M…
$ metastases                  <chr> "No mets", "No mets", "No …
$ positive_nodes              <chr> "1 - 3", "0", "0", "0", "4…
$ pr                          <chr> "Negative", "Negative", "N…
$ race                        <chr> "Caucasian", "Caucasian", …
$ set                         <chr> "Validation TN", "Validati…
$ tissue                      <chr> "Breast cancer", "Breast c…
$ tnbc_subtype                <chr> "Mesenchymal (MES)", "Basa…
$ triple_negative_status      <chr> "TN", "TN", "TN", "TN", "T…
$ tumor_grade                 <chr> NA, "Poorly Differentiated…
$ tumor_size                  <chr> "2 - 5 cm", "<=2cm", "2 - …
mdata <- mdata %>% 
  mutate(her2 = if_else(!is.na(her2), her2, "Not Available")) %>% 
  mutate(er = factor(er, levels = c("Negative", "Positive")), 
         pr = factor(pr, levels = c("Negative", "Positive")), 
         her2 = factor(her2, levels = c("Negative", "Positive", "Not Available"))) %>% 
  select(geo_accession, everything())
head(mdata) 

Reading in raw probe intensity data

Celfiles downloaded from GEO and kept the folder celfiles/

celFiles <- list.celfiles('celfiles/', full.names = TRUE, listGzipped = TRUE)
celFiles %>% head()
[1] "celfiles//GSM1974566_S1_H10.CEL.gz" 
[2] "celfiles//GSM1974567_S1_H14.CEL.gz" 
[3] "celfiles//GSM1974568_S1_H19.CEL.gz" 
[4] "celfiles//GSM1974569_S1_H20B.CEL.gz"
[5] "celfiles//GSM1974570_S1_H22.CEL.gz" 
[6] "celfiles//GSM1974571_S1_H27.CEL.gz" 
names(celFiles) <- celFiles %>% 
  basename() %>% 
  str_split("\\.") %>% 
  map_chr(~{.x[1]}) %>% 
  str_split("_") %>% 
  map_chr(~{.x[1]}) 

head(celFiles)
                           GSM1974566 
 "celfiles//GSM1974566_S1_H10.CEL.gz" 
                           GSM1974567 
 "celfiles//GSM1974567_S1_H14.CEL.gz" 
                           GSM1974568 
 "celfiles//GSM1974568_S1_H19.CEL.gz" 
                           GSM1974569 
"celfiles//GSM1974569_S1_H20B.CEL.gz" 
                           GSM1974570 
 "celfiles//GSM1974570_S1_H22.CEL.gz" 
                           GSM1974571 
 "celfiles//GSM1974571_S1_H27.CEL.gz" 

Rearranging rows of metadata to match order of samples in celFiles.

mdata <- mdata[match(mdata$geo_accession, names(celFiles)), ]

Getting only the relevant variables from the metadata.

mdata_subset <- mdata %>%
  select(geo_accession, 
         title, 
         triple_negative_status, 
         tnbc_subtype,
         submission_date,
         er,
         her2,
         pr,
         race,
         set,
         gender, 
         age_years) %>% 
  mutate(across(where(is.character), .fns = factor)) %>% 
  mutate(tnbc_subtype = if_else(is.na(as.character(tnbc_subtype)), "Not Applicable", as.character(tnbc_subtype))) %>% 
  mutate(tnbc_subtype = factor(tnbc_subtype)) %>% 
  as.data.frame()


rownames(mdata_subset) <- as.character(mdata_subset$geo_accession)

head(mdata_subset)
NA
rawData <- read.celfiles(celFiles, phenoData = AnnotatedDataFrame(mdata_subset))
Platform design info loaded.
Reading in : celfiles//GSM1974566_S1_H10.CEL.gz
Reading in : celfiles//GSM1974567_S1_H14.CEL.gz
Reading in : celfiles//GSM1974568_S1_H19.CEL.gz
Reading in : celfiles//GSM1974569_S1_H20B.CEL.gz
Reading in : celfiles//GSM1974570_S1_H22.CEL.gz
Reading in : celfiles//GSM1974571_S1_H27.CEL.gz
Reading in : celfiles//GSM1974572_S1_H28.CEL.gz
Reading in : celfiles//GSM1974573_S1_H29.CEL.gz
Reading in : celfiles//GSM1974574_S1_H2B.CEL.gz
Reading in : celfiles//GSM1974575_S1_H31.CEL.gz
Reading in : celfiles//GSM1974576_S1_H35B.CEL.gz
Reading in : celfiles//GSM1974577_S1_H36.CEL.gz
Reading in : celfiles//GSM1974578_S1_H38.CEL.gz
Reading in : celfiles//GSM1974579_S1_H3B.CEL.gz
Reading in : celfiles//GSM1974580_S1_H40.CEL.gz
Reading in : celfiles//GSM1974581_S1_H41.CEL.gz
Reading in : celfiles//GSM1974582_S2_H43.CEL.gz
Reading in : celfiles//GSM1974583_S2_H44.CEL.gz
Reading in : celfiles//GSM1974584_S2_H45.CEL.gz
Reading in : celfiles//GSM1974585_S2_H46.CEL.gz
Reading in : celfiles//GSM1974586_S2_H47.CEL.gz
Reading in : celfiles//GSM1974587_S2_H48.CEL.gz
Reading in : celfiles//GSM1974588_S2_H49.CEL.gz
Reading in : celfiles//GSM1974589_S1_H4B.CEL.gz
Reading in : celfiles//GSM1974590_S2_H50.CEL.gz
Reading in : celfiles//GSM1974591_S2_H51.CEL.gz
Reading in : celfiles//GSM1974592_S2_H52.CEL.gz
Reading in : celfiles//GSM1974593_S2_H53.CEL.gz
Reading in : celfiles//GSM1974594_S2_H58B.CEL.gz
Reading in : celfiles//GSM1974595_S2_H59.CEL.gz
Reading in : celfiles//GSM1974596_S1_H6.CEL.gz
Reading in : celfiles//GSM1974597_S2_H60.CEL.gz
Reading in : celfiles//GSM1974598_S2_H61.CEL.gz
Reading in : celfiles//GSM1974599_S2_H62.CEL.gz
Reading in : celfiles//GSM1974600_S2_H63.CEL.gz
Reading in : celfiles//GSM1974601_S2_H64.CEL.gz
Reading in : celfiles//GSM1974602_S2_H65.CEL.gz
Reading in : celfiles//GSM1974603_S2_H66.CEL.gz
Reading in : celfiles//GSM1974604_S2_H67.CEL.gz
Reading in : celfiles//GSM1974605_S2_H68.CEL.gz
Reading in : celfiles//GSM1974606_S2_H69.CEL.gz
Reading in : celfiles//GSM1974607_S1_H7.CEL.gz
Reading in : celfiles//GSM1974608_S2_H70.CEL.gz
Reading in : celfiles//GSM1974609_S2_H71.CEL.gz
Reading in : celfiles//GSM1974610_S2_H72B.CEL.gz
Reading in : celfiles//GSM1974611_S2_H73.CEL.gz
Reading in : celfiles//GSM1974612_S1_H8.CEL.gz
Reading in : celfiles//GSM1974613_S1_H9.CEL.gz
Reading in : celfiles//GSM1974614_S2_H54B.CEL.gz
Reading in : celfiles//GSM1974615_S2_H55B.CEL.gz
Reading in : celfiles//GSM1974616_S2_H56B.CEL.gz
Reading in : celfiles//GSM1974617_S2_H57C.CEL.gz
Reading in : celfiles//GSM1974618_S2_H76.CEL.gz
Reading in : celfiles//GSM1974619_S2_H77.CEL.gz
Reading in : celfiles//GSM1974620_S2_H78.CEL.gz
Reading in : celfiles//GSM1974621_S2_H79.CEL.gz
Reading in : celfiles//GSM1974622_S2_H80.CEL.gz
Reading in : celfiles//GSM1974623_S2_H81.CEL.gz
Reading in : celfiles//GSM1974624_S2_H82.CEL.gz
Reading in : celfiles//GSM1974625_S2_H83.CEL.gz
Reading in : celfiles//GSM1974626_S2_H84.CEL.gz
Reading in : celfiles//GSM1974627_S2_H85B.CEL.gz
Reading in : celfiles//GSM1974628_S2_H88.CEL.gz
Reading in : celfiles//GSM1974629_S2_H89.CEL.gz
Reading in : celfiles//GSM1974630_S2_H90.CEL.gz
Reading in : celfiles//GSM1974631_S2_H91B.CEL.gz
Reading in : celfiles//GSM1974632_S3_H100C.CEL.gz
Reading in : celfiles//GSM1974633_S3_H102C.CEL.gz
Reading in : celfiles//GSM1974634_S3_H103C.CEL.gz
Reading in : celfiles//GSM1974635_S3_H104C.CEL.gz
Reading in : celfiles//GSM1974636_S3_H105C.CEL.gz
Reading in : celfiles//GSM1974637_S3_H106C.CEL.gz
Reading in : celfiles//GSM1974638_S3_H107C.CEL.gz
Reading in : celfiles//GSM1974639_S3_H108C.CEL.gz
Reading in : celfiles//GSM1974640_S3_H109C.CEL.gz
Reading in : celfiles//GSM1974641_S3_H110C.CEL.gz
Reading in : celfiles//GSM1974642_S3_H111C.CEL.gz
Reading in : celfiles//GSM1974643_S3_H113C.CEL.gz
Reading in : celfiles//GSM1974644_S3_H114C.CEL.gz
Reading in : celfiles//GSM1974645_S3_H115.CEL.gz
Reading in : celfiles//GSM1974646_S3_H116C.CEL.gz
Reading in : celfiles//GSM1974647_S3_H117C.CEL.gz
Reading in : celfiles//GSM1974648_S3_H118C.CEL.gz
Reading in : celfiles//GSM1974649_S3_H119C.CEL.gz
Reading in : celfiles//GSM1974650_S3_H120C.CEL.gz
Reading in : celfiles//GSM1974651_S3_H121C.CEL.gz
Reading in : celfiles//GSM1974652_S3_H122C.CEL.gz
Reading in : celfiles//GSM1974653_S3_H123C.CEL.gz
Reading in : celfiles//GSM1974654_S3_H124C.CEL.gz
Reading in : celfiles//GSM1974655_S3_H125C.CEL.gz
Reading in : celfiles//GSM1974656_S3_H126C.CEL.gz
Reading in : celfiles//GSM1974657_S3_H127C.CEL.gz
Reading in : celfiles//GSM1974658_S3_H128C.CEL.gz
Reading in : celfiles//GSM1974659_S3_H129C.CEL.gz
Reading in : celfiles//GSM1974660_S3_H130.CEL.gz
Reading in : celfiles//GSM1974661_S3_H131.CEL.gz
Reading in : celfiles//GSM1974662_S3_H132.CEL.gz
Reading in : celfiles//GSM1974663_S3_H133D.CEL.gz
Reading in : celfiles//GSM1974664_S3_H134.CEL.gz
Reading in : celfiles//GSM1974665_S3_H135B.CEL.gz
Reading in : celfiles//GSM1974666_S3_H136B.CEL.gz
Reading in : celfiles//GSM1974667_S3_H137B.CEL.gz
Reading in : celfiles//GSM1974668_S3_H138.CEL.gz
Reading in : celfiles//GSM1974669_S3_H139.CEL.gz
Reading in : celfiles//GSM1974670_S3_H140.CEL.gz
Reading in : celfiles//GSM1974671_S3_H141.CEL.gz
Reading in : celfiles//GSM1974672_S3_H142.CEL.gz
Reading in : celfiles//GSM1974673_S3_H143.CEL.gz
Reading in : celfiles//GSM1974674_S3_H144.CEL.gz
Reading in : celfiles//GSM1974675_S3_H145.CEL.gz
Reading in : celfiles//GSM1974676_S3_H146.CEL.gz
Reading in : celfiles//GSM1974677_S3_H147.CEL.gz
Reading in : celfiles//GSM1974678_S3_H148.CEL.gz
Reading in : celfiles//GSM1974679_S3_H149.CEL.gz
Reading in : celfiles//GSM1974680_S3_H150.CEL.gz
Reading in : celfiles//GSM1974681_S3_H151.CEL.gz
Reading in : celfiles//GSM1974682_S3_H152.CEL.gz
Reading in : celfiles//GSM1974683_S3_H153.CEL.gz
Reading in : celfiles//GSM1974684_S3_H154.CEL.gz
Reading in : celfiles//GSM1974685_S3_H155.CEL.gz
Reading in : celfiles//GSM1974686_S3_H156.CEL.gz
Reading in : celfiles//GSM1974687_S3_H157.CEL.gz
Reading in : celfiles//GSM1974688_S3_H158.CEL.gz
Reading in : celfiles//GSM1974689_S3_H159.CEL.gz
Reading in : celfiles//GSM1974690_S3_H160.CEL.gz
Reading in : celfiles//GSM1974691_S3_H161.CEL.gz
Reading in : celfiles//GSM1974692_S3_H162.CEL.gz
Reading in : celfiles//GSM1974693_S3_H163.CEL.gz
Reading in : celfiles//GSM1974694_S3_H164C.CEL.gz
Reading in : celfiles//GSM1974695_S3_H165.CEL.gz
Reading in : celfiles//GSM1974696_S3_H166.CEL.gz
Reading in : celfiles//GSM1974697_S3_H167.CEL.gz
Reading in : celfiles//GSM1974698_S3_H168.CEL.gz
Reading in : celfiles//GSM1974699_S3_H170.CEL.gz
Reading in : celfiles//GSM1974700_S3_H171.CEL.gz
Reading in : celfiles//GSM1974701_S3_H172B.CEL.gz
Reading in : celfiles//GSM1974702_S3_H173.CEL.gz
Reading in : celfiles//GSM1974703_S3_H174.CEL.gz
Reading in : celfiles//GSM1974704_S3_H175B.CEL.gz
Reading in : celfiles//GSM1974705_S3_H176.CEL.gz
Reading in : celfiles//GSM1974706_S3_H177.CEL.gz
Reading in : celfiles//GSM1974707_S3_H178.CEL.gz
Reading in : celfiles//GSM1974708_S3_H179.CEL.gz
Reading in : celfiles//GSM1974709_S3_H180.CEL.gz
Reading in : celfiles//GSM1974710_S3_H181.CEL.gz
Reading in : celfiles//GSM1974711_S3_H182.CEL.gz
Reading in : celfiles//GSM1974712_S3_H183.CEL.gz
Reading in : celfiles//GSM1974713_S3_H184.CEL.gz
Reading in : celfiles//GSM1974714_S3_H185.CEL.gz
Reading in : celfiles//GSM1974715_S3_H186.CEL.gz
Reading in : celfiles//GSM1974716_S3_H187B.CEL.gz
Reading in : celfiles//GSM1974717_S3_H188.CEL.gz
Reading in : celfiles//GSM1974718_S3_H189.CEL.gz
Reading in : celfiles//GSM1974719_S3_H190.CEL.gz
Reading in : celfiles//GSM1974720_S3_H191B.CEL.gz
Reading in : celfiles//GSM1974721_S3_H193.CEL.gz
Reading in : celfiles//GSM1974722_S3_H194.CEL.gz
Reading in : celfiles//GSM1974723_S3_H196.CEL.gz
Reading in : celfiles//GSM1974724_S3_H197.CEL.gz
Reading in : celfiles//GSM1974725_S3_H198.CEL.gz
Reading in : celfiles//GSM1974726_S3_H199.CEL.gz
Reading in : celfiles//GSM1974727_S3_H200.CEL.gz
Reading in : celfiles//GSM1974728_S3_H201.CEL.gz
Reading in : celfiles//GSM1974729_S3_H202.CEL.gz
Reading in : celfiles//GSM1974730_S3_H203.CEL.gz
Reading in : celfiles//GSM1974731_S3_H204.CEL.gz
Reading in : celfiles//GSM1974732_S3_H205B.CEL.gz
Reading in : celfiles//GSM1974733_S3_H206B.CEL.gz
Reading in : celfiles//GSM1974734_S3_H207B.CEL.gz
Reading in : celfiles//GSM1974735_S3_H208B.CEL.gz
Reading in : celfiles//GSM1974736_S3_H209B.CEL.gz
Reading in : celfiles//GSM1974737_S3_H210B.CEL.gz
Reading in : celfiles//GSM1974738_S3_H211B.CEL.gz
Reading in : celfiles//GSM1974739_S3_H212.CEL.gz
Reading in : celfiles//GSM1974740_S3_H213.CEL.gz
Reading in : celfiles//GSM1974741_S3_H214.CEL.gz
Reading in : celfiles//GSM1974742_S3_H215.CEL.gz
Reading in : celfiles//GSM1974743_S3_H216.CEL.gz
Reading in : celfiles//GSM1974744_S3_H217.CEL.gz
Reading in : celfiles//GSM1974745_S3_H218.CEL.gz
Reading in : celfiles//GSM1974746_S3_H219.CEL.gz
Reading in : celfiles//GSM1974747_S3_H220.CEL.gz
Reading in : celfiles//GSM1974748_S3_H221.CEL.gz
Reading in : celfiles//GSM1974749_S3_H222.CEL.gz
Reading in : celfiles//GSM1974750_S3_H224.CEL.gz
Reading in : celfiles//GSM1974751_S3_H225B.CEL.gz
Reading in : celfiles//GSM1974752_S3_H226B.CEL.gz
Reading in : celfiles//GSM1974753_S3_H227B.CEL.gz
Reading in : celfiles//GSM1974754_S3_H228.CEL.gz
Reading in : celfiles//GSM1974755_S3_H229.CEL.gz
Reading in : celfiles//GSM1974756_S3_H230.CEL.gz
Reading in : celfiles//GSM1974757_S3_H93C.CEL.gz
Reading in : celfiles//GSM1974758_S3_H94C.CEL.gz
Reading in : celfiles//GSM1974759_S3_H95C.CEL.gz
Reading in : celfiles//GSM1974760_S3_H96C.CEL.gz
Reading in : celfiles//GSM1974761_S3_H97CC.CEL.gz
Reading in : celfiles//GSM1974762_S3_H98C.CEL.gz
Reading in : celfiles//GSM1974763_S3_H99C.CEL.gz
Reading in : celfiles//GSM1978883_S1_H11.CEL.gz
Reading in : celfiles//GSM1978884_S1_H12.CEL.gz
Reading in : celfiles//GSM1978885_S1_H13.CEL.gz
Reading in : celfiles//GSM1978886_S1_H15.CEL.gz
Reading in : celfiles//GSM1978887_S1_H16.CEL.gz
Reading in : celfiles//GSM1978888_S1_H17.CEL.gz
Reading in : celfiles//GSM1978889_S1_H18.CEL.gz
Reading in : celfiles//GSM1978890_S1_H1B.CEL.gz
Reading in : celfiles//GSM1978891_S1_H21.CEL.gz
Reading in : celfiles//GSM1978892_S1_H23.CEL.gz
Reading in : celfiles//GSM1978893_S1_H25.CEL.gz
Reading in : celfiles//GSM1978894_S1_H30.CEL.gz
Reading in : celfiles//GSM1978895_S1_H32.CEL.gz
Reading in : celfiles//GSM1978896_S1_H37.CEL.gz
Reading in : celfiles//GSM1978897_S1_H39.CEL.gz
Reading in : celfiles//GSM1978898_S1_H42.CEL.gz
Reading in : celfiles//GSM1978899_S1_H5.CEL.gz
Reading in : celfiles//GSM1978900_S3_H195.CEL.gz
Reading in : celfiles//GSM1978901_S3_H223.CEL.gz
Reading in : celfiles//GSM1978902_S4_H231.CEL.gz
Reading in : celfiles//GSM1978903_S4_H232.CEL.gz
Reading in : celfiles//GSM1978904_S4_H233.CEL.gz
Reading in : celfiles//GSM1978905_S4_H234.CEL.gz
Reading in : celfiles//GSM1978906_S4_H235.CEL.gz
Reading in : celfiles//GSM1978907_S4_H236.CEL.gz
Reading in : celfiles//GSM1978908_S4_H237.CEL.gz
Reading in : celfiles//GSM1978909_S4_H238.CEL.gz
Reading in : celfiles//GSM1978910_S4_H239.CEL.gz
Reading in : celfiles//GSM1978911_S4_H240.CEL.gz
Reading in : celfiles//GSM1978912_S4_H241.CEL.gz
Reading in : celfiles//GSM1978913_S4_H242.CEL.gz
Reading in : celfiles//GSM1978914_S4_H243.CEL.gz
Reading in : celfiles//GSM1978915_S4_H244.CEL.gz
Reading in : celfiles//GSM1978916_S4_H245.CEL.gz
Reading in : celfiles//GSM1978917_S4_H246.CEL.gz
Reading in : celfiles//GSM1978918_S4_H247.CEL.gz
Reading in : celfiles//GSM1978919_S4_H248.CEL.gz
Reading in : celfiles//GSM1978920_S4_H249.CEL.gz
Reading in : celfiles//GSM1978921_S4_H250.CEL.gz
Reading in : celfiles//GSM1978922_S4_H251.CEL.gz
Reading in : celfiles//GSM1978923_S4_H252.CEL.gz
Reading in : celfiles//GSM1978924_S4_H253.CEL.gz
Reading in : celfiles//GSM1978925_S4_H254.CEL.gz
Reading in : celfiles//GSM1978926_S4_H255.CEL.gz
Reading in : celfiles//GSM1978927_S4_H256.CEL.gz
Reading in : celfiles//GSM1978928_S4_H257B.CEL.gz
Reading in : celfiles//GSM1978929_S4_H258B.CEL.gz
Reading in : celfiles//GSM1978930_S4_H259.CEL.gz
Reading in : celfiles//GSM1978931_S4_H261.CEL.gz
Reading in : celfiles//GSM1978932_S4_H262.CEL.gz
Reading in : celfiles//GSM1978933_S4_H263.CEL.gz
Reading in : celfiles//GSM1978934_S4_H264.CEL.gz
Reading in : celfiles//GSM1978935_S4_H265.CEL.gz
Reading in : celfiles//GSM1978936_S4_H266.CEL.gz
Reading in : celfiles//GSM1978937_S4_H267.CEL.gz
Reading in : celfiles//GSM1978938_S4_H268.CEL.gz
Reading in : celfiles//GSM1978939_S4_H269.CEL.gz
Reading in : celfiles//GSM1978940_S4_H270.CEL.gz
Reading in : celfiles//GSM1978941_S4_H271.CEL.gz
Reading in : celfiles//GSM1978942_S4_H272.CEL.gz
Reading in : celfiles//GSM1978943_S4_H273.CEL.gz
Reading in : celfiles//GSM1978944_S4_H274.CEL.gz
Reading in : celfiles//GSM1978945_S4_H275B.CEL.gz
Reading in : celfiles//GSM1978946_S4_H276B.CEL.gz
Reading in : celfiles//GSM1978947_S4_H278.CEL.gz
Reading in : celfiles//GSM1978948_S4_H279B.CEL.gz
Reading in : celfiles//GSM1978949_S4_H280B.CEL.gz
Warning in read.celfiles(celFiles, phenoData = AnnotatedDataFrame(mdata_subset)) :
  'channel' automatically added to varMetadata in phenoData.
# saveRDS(object = rawData, "rawData.RDS")
rawData <- readRDS("rawData.RDS")

Looking at the dimensions of the raw expression matrix.

exprs(rawData) %>% dim()
[1] 1354896     265

Plotting some metadata attributes

Looking at the number of samples for triple negative status and for set.

mdata_subset %>% 
  count(triple_negative_status, set)
mdata_subset %>% 
  count(triple_negative_status) %>% 
  mutate(proportion = round(n/sum(n), 3)) %>% 
  ggplot() +
  geom_col(mapping = aes(y = "dummy_group",
                         x = proportion,
                         fill = triple_negative_status)) +
    theme(axis.text.x = element_text(angle = 90, size = 7),
          axis.text.y = element_blank(),
          axis.ticks.y = element_blank(),
          axis.title.y = element_blank(),
          title = element_text(size = 10),
          panel.grid.major = element_blank(),
          panel.grid.minor = element_blank(),
          panel.background = element_blank(),
          axis.line = element_line(colour = "black", size = 0.5),
          legend.direction = "horizontal", legend.position = "top") +
  geom_text(aes(y = 1, 
                x = proportion, 
                label = proportion, 
                group = triple_negative_status), 
            size = 5, 
            position = position_stack(vjust = 0.5), 
            color = "white") +
  scale_fill_npg(name = "Triple Negative Status") +
  labs(x = "Proportion",
       title = str_wrap("Proportions of TNBC status values for GSE76275", 60))

ggsave(filename = "plots/exploration_plots/GSE76275_tnbc_proportion_barplot.png")
Saving 5.03 x 3.11 in image

mdata_subset %>% 
  count(triple_negative_status, pr) %>% 
  mutate(proportion = round(n/sum(n), 3)) %>% 
  ggplot() +
  geom_col(mapping = aes(x = pr,
                         y = proportion,
                         fill = triple_negative_status)) +
    geom_text(aes(x = pr, 
                y = proportion, 
                label = proportion, 
                group = triple_negative_status), 
            size = 3, 
            position = position_stack(vjust = 0.5), 
            color = "white") +
    theme(title = element_text(size = 10),
          panel.grid.major = element_blank(),
          panel.grid.minor = element_blank(),
          panel.background = element_blank(),
          axis.line = element_line(colour = "black", size = 0.5),
          legend.direction = "vertical", legend.position = "right") +
  scale_fill_npg(name = "Triple Negative Status") +
  labs(x = "Progesterone Receptor Status",
       y = "Proportion",
       title = str_wrap("Proportions of progesterone receptor status values for GSE76275", 60))

ggsave(filename = "plots/exploration_plots/GSE76275_pr_proportion_barplot.png")
Saving 5.03 x 3.11 in image

mdata_subset %>% 
  count(triple_negative_status, er) %>% 
  mutate(proportion = round(n/sum(n), 3)) %>% 
  ggplot() +
  geom_col(mapping = aes(x = er,
                         y = proportion,
                         fill = triple_negative_status)) +
      geom_text(aes(x = er, 
                y = proportion, 
                label = proportion, 
                group = triple_negative_status), 
            size = 3, 
            position = position_stack(vjust = 0.5), 
            color = "white") +
    theme(title = element_text(size = 10),
          panel.grid.major = element_blank(),
          panel.grid.minor = element_blank(),
          panel.background = element_blank(),
          axis.line = element_line(colour = "black", size = 0.5),
          legend.direction = "vertical", legend.position = "right") +
  scale_fill_npg(name = "Triple Negative Status") +
  labs(x = "Estrogen Receptor Status",
       y = "Proportion",
       title = str_wrap("Proportions of estrogen receptor status values for GSE76275", 60))

ggsave(filename = "plots/exploration_plots/GSE76275_er_proportion_barplot.png")
Saving 5.03 x 3.11 in image

mdata_subset %>% 
  count(triple_negative_status, her2) %>% 
  mutate(proportion = round(n/sum(n), 3)) %>% 
  ggplot() +
  geom_col(mapping = aes(x = her2,
                         y = proportion,
                         fill = triple_negative_status)) +
    geom_text(aes(x = her2, 
                y = proportion, 
                label = proportion, 
                group = triple_negative_status), 
            size = 3, 
            position = position_stack(vjust = 0.5), 
            color = "white") +
    theme(title = element_text(size = 10),
          panel.grid.major = element_blank(),
          panel.grid.minor = element_blank(),
          panel.background = element_blank(),
          axis.line = element_line(colour = "black", size = 0.5),
          legend.direction = "vertical", legend.position = "right") +
  scale_fill_npg(name = "Triple Negative Status") +
  labs(x = "HER2 Amplification Status",
       y = "Proportion",
       title = str_wrap("Proportions of HER2 amplification status values for GSE76275", 60))

ggsave(filename = "plots/exploration_plots/GSE76275_her2_proportion_barplot.png")
Saving 5.03 x 3.11 in image

list("ER" = mdata_subset$geo_accession[mdata_subset$er == "Positive"],
     "PR" = mdata_subset$geo_accession[mdata_subset$pr == "Positive"],
     "HER2" = mdata_subset$geo_accession[mdata_subset$her2 == "Positive"]) %>%
  fromList(.) %>% 
  upset(., c("ER", "PR", "HER2"), width_ratio = 0.2) +
  ggtitle(str_wrap("Upset plot for different combinations of ER, PR, and HER2 status in the non-TNBC samples in GSE76275", 60)) +
  theme(title = element_text(size = 7))

ggsave("plots/exploration_plots/GSE76275_nonTNBC_upset.png")
Saving 5.03 x 3.11 in image

Reordering the columns in the metadata.

mdata <- select(mdata, geo_accession, everything())
head(mdata)

Performing RMA

Using regular RMA on data (without separating by class)

res_1 <- rma(rawData)
Loading required package: RSQLite
Loading required package: DBI
Background correcting
Normalizing
Calculating Expression
# saveRDS(object = res_1, "res_1.RDS")
res_1 <- readRDS("res_1.RDS")
exprs(res_1) %>% 
  dim()
[1] 54675   265
exprs(res_1)[1:5, 1:5]
          GSM1974566 GSM1974567 GSM1974568 GSM1974569
1007_s_at  10.754163  11.361803   9.690693  10.157010
1053_at     8.625663   9.011796   7.854072   7.925281
117_at      7.333973   7.385199   7.466878   8.048563
121_at      9.077887   8.782080   8.885189   8.775218
1255_g_at   4.656331   4.635625   4.536114   4.626950
          GSM1974570
1007_s_at  10.597699
1053_at     8.456781
117_at      7.581895
121_at      8.752407
1255_g_at   5.454820

Performing class-specific RMA by reading in the expression sets separately

Getting lists of the TNBC samples and the non-TNBC samples.

tnbc_samples <- mdata_subset %>% 
  filter(triple_negative_status == "TN") %>% 
  select(geo_accession) %>% 
  unlist(use.names = F) %>% 
  as.character()

head(tnbc_samples)
[1] "GSM1974566" "GSM1974567" "GSM1974568" "GSM1974569"
[5] "GSM1974570" "GSM1974571"
nontnbc_samples <- mdata_subset %>% 
  filter(triple_negative_status == "not TN") %>% 
  select(geo_accession) %>% 
  unlist(use.names = F) %>% 
  as.character()

head(nontnbc_samples)
[1] "GSM1978883" "GSM1978884" "GSM1978885" "GSM1978886"
[5] "GSM1978887" "GSM1978888"

Creating different metadata tables for TNBC and nonTNBC.

mdata_subset_tnbc <- mdata_subset[tnbc_samples, ]
dim(mdata_subset_tnbc)
[1] 198  12
mdata_subset_nontnbc <- mdata_subset[nontnbc_samples, ]
dim(mdata_subset_nontnbc)
[1] 67 12

Reading in the TNBC files.

# rawData_tnbc <- read.celfiles(filenames = celFiles[tnbc_samples], 
#                               phenoData = AnnotatedDataFrame(mdata_subset_tnbc))
# 
# rawData_tnbc
# saveRDS(rawData_tnbc, file = "rawData_tnbc.RDS")
rawData_tnbc <- readRDS(file = "rawData_tnbc.RDS")
rawData_tnbc
ExpressionFeatureSet (storageMode: lockedEnvironment)
assayData: 1354896 features, 198 samples 
  element names: exprs 
protocolData
  rowNames: GSM1974566 GSM1974567 ... GSM1974763 (198 total)
  varLabels: exprs dates
  varMetadata: labelDescription channel
phenoData
  rowNames: GSM1974566 GSM1974567 ... GSM1974763 (198 total)
  varLabels: geo_accession title ... age_years (11 total)
  varMetadata: labelDescription channel
featureData: none
experimentData: use 'experimentData(object)'
Annotation: pd.hg.u133.plus.2 
Loading required package: pd.hg.u133.plus.2
Loading required package: RSQLite
Loading required package: DBI

Reading in the nonTNBC files.

# rawData_nontnbc <- read.celfiles(filenames = celFiles[nontnbc_samples], 
#                               phenoData = AnnotatedDataFrame(mdata_subset_nontnbc))
# 
# rawData_nontnbc
# saveRDS(rawData_nontnbc, file = "rawData_nontnbc.RDS")
rawData_nontnbc <- readRDS(file = "rawData_nontnbc.RDS")
rawData_nontnbc
ExpressionFeatureSet (storageMode: lockedEnvironment)
assayData: 1354896 features, 67 samples 
  element names: exprs 
protocolData
  rowNames: GSM1978883 GSM1978884 ... GSM1978949 (67
    total)
  varLabels: exprs dates
  varMetadata: labelDescription channel
phenoData
  rowNames: GSM1978883 GSM1978884 ... GSM1978949 (67
    total)
  varLabels: geo_accession title ... age_years (11
    total)
  varMetadata: labelDescription channel
featureData: none
experimentData: use 'experimentData(object)'
Annotation: pd.hg.u133.plus.2 

Performing RMA on TNBC data.

# res_tnbc <- rma(rawData_tnbc)
# saveRDS(res_tnbc, file = "res_tnbc.RDS")
res_tnbc <- readRDS(file = "res_tnbc.RDS")

Performing RMA on nonTNBC data.

# res_nontnbc <- rma(rawData_nontnbc)
# saveRDS(res_nontnbc, file = "res_nontnbc.RDS")
res_nontnbc <- readRDS(file = "res_nontnbc.RDS")

Combining the expression matrices of TNBC and nonTNBC data after separate RMA.

res_joint <- cbind(exprs(res_tnbc), exprs(res_nontnbc))
res_joint[1:5, 1:5]
          GSM1974566 GSM1974567 GSM1974568 GSM1974569
1007_s_at  10.703231  11.345325   9.732361  10.175704
1053_at     8.605269   9.019553   7.794234   7.945029
117_at      7.360884   7.373951   7.481344   8.047586
121_at      9.100729   8.776369   8.860402   8.755606
1255_g_at   4.664492   4.628692   4.569530   4.627230
          GSM1974570
1007_s_at  10.576463
1053_at     8.497373
117_at      7.530427
121_at      8.766560
1255_g_at   5.467292

Saving certain CSV files for everyone else to refer to

Saving the joint expression matrix from class-specific QN.

res_joint %>% 
  as_tibble(rownames = "probe_id") %>% 
  write_csv("dataframe_files/post_classQN_expression.csv")
Error: Cannot open file for writing:
* 'dataframe_files/post_classQN_expression.csv'

Saving a subset of the metadata that I think is relevant.

mdata_subset %>% 
  write_csv("dataframe_files/metadata_subset.csv")

Saving the TNBC and nonTNBC metadata separately, just in case.

mdata_subset_tnbc %>% 
  write_csv("dataframe_files/metadata_subset_tnbc.csv")
mdata_subset_nontnbc %>% 
  write_csv("dataframe_files/metadata_subset_nontnbc.csv")

Getting sample-specific boxplots

Sample specific boxplots for regular RMA QN

res_1_df_long <- res_1 %>%
  exprs() %>% 
  as_tibble(rownames = "probeID") %>% 
  pivot_longer(cols = all_of(c(tnbc_samples, nontnbc_samples)), names_to = "sample_id", 
               values_to = "intensity") %>% 
  left_join(., mdata_subset, by = c("sample_id" = "geo_accession"))
# saveRDS(object = res_1_df_long, "res_1_df_long.RDS")
res_1_df_long <- readRDS("res_1_df_long.RDS")
p2 <- res_1_df_long %>% 
  ggplot() +
  geom_boxplot(mapping = aes(x = reorder(sample_id, as.numeric(set)), y = intensity, color = set), outlier.size = 0.2)
p2 <- p2 + labs(x = "samples", 
       title = str_wrap("Sample-wise log2 intensity boxplots for global quantile normalization for GSE76275", 60)) +
  scale_color_npg(name = "Triple Negative Status") +
  theme_light() +
  theme(axis.text.x = element_blank(),
        axis.ticks.x = element_blank(),
        title = element_text(size = 10),
        legend.position = "top", 
        legend.direction = "horizontal")
p2

NA
ggsave("plots/exploration_plots/GSE76275_post_regQN_boxplots.png", 
       p2, 
       units = "cm", 
       width = 30, 
       height = 10)
rm(res_1_df_long)

Sample specific boxplots for classQN

res_joint_df_long <- res_joint %>% 
  as_tibble(rownames = "probeID") %>% 
  pivot_longer(cols = all_of(c(tnbc_samples, nontnbc_samples)), names_to = "sample_id", 
               values_to = "intensity")
  
# saveRDS(object = res_joint_df_long, "res_joint_df_long.RDS")
res_joint_df_long <- readRDS("res_joint_df_long.RDS")
p1 <- res_joint_df_long %>% 
  left_join(., mdata_subset, by = c("sample_id" = "geo_accession")) %>% 
  mutate(sample_id = factor(sample_id)) %>% 
  ggplot() +
   geom_boxplot(mapping = aes(x = reorder(sample_id, as.numeric(set)), y = intensity, color = set), outlier.size = 0.2)
p1 <- p1 + labs(x = "samples", 
       title = str_wrap("Sample-wise log2 intensity boxplots for class-specific quantile normalization for GSE76275", 60)) +
scale_color_npg(name = "Triple Negative Status") +
  theme_light() +
  theme(axis.text.x = element_blank(),
        axis.ticks.x = element_blank(),
        title = element_text(size = 10),
        legend.position = "top", 
        legend.direction = "horizontal")

p1 

ggsave("plots/exploration_plots/GSE76275_post_classQN_boxplots.png", 
       p1, 
       units = "cm", width = 20, height = 10)
res_joint_df_long %>% 
  left_join(., mdata_subset, by = c("sample_id" = "geo_accession")) %>% 
  mutate(sample_id = factor(sample_id)) %>% 
  ggplot() +
   geom_boxplot(mapping = aes(x = reorder(sample_id, as.numeric(set)), y = intensity, fill = set), outlier.size = 0.2) +
labs(x = "samples", 
       title = str_wrap("Sample-wise log2 intensity boxplots for class-specific quantile normalization for GSE76275", 60)) +
scale_fill_npg(name = "Triple Negative Status") +
  theme_light() +
  theme(axis.text.x = element_blank(),
        axis.ticks.x = element_blank(),
        title = element_text(size = 10),
        legend.position = "right", 
        legend.direction = "vertical")

ggsave("plots/exploration_plots/GSE76275_post_classQN_boxplots_bad.png", units = "cm", width = 20, height = 10)

Performing PCA

Custom functions

Function to create an annotated data frame by combining PC scores as well as metadata: useful for ggplot visualization.

get_pca_annot_df <- function(pca.obj, sample_id_col, mdata_df){
  ind_scores <- pca.obj$x
  ind_scores_reordered <- ind_scores[match(rownames(ind_scores), mdata_df[[sample_id_col]]), ] %>% 
    as_tibble(rownames = sample_id_col) %>% 
    mutate(filename = factor(!!sym(sample_id_col)))
  ind_scores_annot <- left_join(ind_scores_reordered, y = mdata_df, by = sample_id_col) %>% 
  select(all_of(colnames(mdata_subset)), contains("PC"))
  return(ind_scores_annot)
}

Performing PCA on regular RMA data

# pca.res_1 <- res_1 %>% 
#   exprs() %>% 
#   t() %>% 
#   prcomp(center = TRUE, scale = TRUE)
# saveRDS(pca.res_1, "pca_res1.RDS")
pca.res_1 <- readRDS("pca_res1.RDS")

Getting the annotated data frame for the PCA.

pca.res_1.annot_df <- get_pca_annot_df(pca.obj = pca.res_1, sample_id_col = "geo_accession", mdata_df= mdata_subset)
head(pca.res_1.annot_df)

Visualizing PCA results

Looking at the variance explained by the first 10 PCs.

fviz_eig(pca.res_1) +
  labs(x = "Principal Component", 
       title = str_wrap("Scree plot for the first 10 principal components for global RMA-normalized data for GSE76275", 60)) +
    theme(title = element_text(size = 10), 
        panel.grid.major = element_blank(),
        panel.grid.minor = element_blank(),
        panel.background = element_blank(),
        axis.line = element_line(colour = "black", size = 0.5))

ggsave("plots/exploration_plots/PCA_wholeQN_scree.png", bg = "white")
Saving 5.03 x 3.11 in image

Superimposing variables in data upon sample PCA scores. The PCA does not seem to separate the TNBC and nonTNBC samples that well when regular RMA is performed.

ggplot(pca.res_1.annot_df) + 
  geom_point(mapping = aes(x = PC1, y = PC2, colour = triple_negative_status)) +
    ggtitle(str_wrap("Samples in first two PCs, coloured by triple negative status for GSE76275 after global quantile normalization", 60)) +
  scale_color_npg(name = "Triple Negative Status") +
  guides(colour = guide_legend(override.aes = list(size= 4))) +
  theme(axis.text.x = element_text(angle = 90, size = 7),
               title = element_text(size = 10),
        panel.grid.major = element_blank(),
        panel.grid.minor = element_blank(),
        panel.background = element_blank(),
        axis.line = element_line(colour = "black", size = 0.5))


ggsave("plots/exploration_plots/PCA_wholeQN_TNBC_status.png", bg = "white")
Saving 5.03 x 3.11 in image

NA

The samples do not seem to separate well by set either.

ggplot(pca.res_1.annot_df) + 
  geom_point(mapping = aes(x = PC1, y = PC2, colour = set)) +
  ggtitle(str_wrap("Samples in first two PCs, coloured by set (discovery or validation) for GSE76275 after global quantile normalization", 60)) +
  scale_color_aaas(name = "Sample Set") +
  guides(colour = guide_legend(override.aes = list(size= 4))) +
  theme(axis.text.x = element_text(angle = 90, size = 7),
               title = element_text(size = 10),
        panel.grid.major = element_blank(),
        panel.grid.minor = element_blank(),
        panel.background = element_blank(),
        axis.line = element_line(colour = "black", size = 0.5))

ggsave("plots/exploration_plots/PCA_wholeQN_set.png", bg = "white")
Saving 5.03 x 3.11 in image

There does not seem to be too strong of a batch effect according to submission date.

ggplot(pca.res_1.annot_df) + 
  geom_point(mapping = aes(x = PC1, y = PC2, colour = submission_date)) +
    ggtitle("Samples in first two PCs, \ncoloured by submission date for whole QN") +
  guides(colour = guide_legend(override.aes = list(size= 4))) +
  theme(axis.text.x = element_text(angle = 90, size = 7),
               title = element_text(size = 10),
        panel.grid.major = element_blank(),
        panel.grid.minor = element_blank(),
        panel.background = element_blank(),
        axis.line = element_line(colour = "black", size = 0.5))

ggsave("plots/exploration_plots/PCA_wholeQN_set.png")
ggplot(pca.res_1.annot_df) + 
  geom_point(mapping = aes(x = PC1, y = PC2, colour = tnbc_subtype)) +
    ggtitle("Samples in first two PCs, \ncoloured by tnbc_subtype for whole QN") +
  guides(colour = guide_legend(override.aes = list(size= 4))) +
  theme(axis.text.x = element_text(angle = 90, size = 7),
               title = element_text(size = 10),
        panel.grid.major = element_blank(),
        panel.grid.minor = element_blank(),
        panel.background = element_blank(),
        axis.line = element_line(colour = "black", size = 0.5), legend.position = "right", legend.direction = "vertical", legend.key.width = unit(x = 0.5, units = "cm")) 

Performing PCA on separately-performed RMA data

pca.res_joint <- res_joint %>% 
  t() %>% 
  prcomp(center = TRUE, scale = TRUE)
# saveRDS(pca.res_joint, "pca_res_joint.RDS")
pca.res_joint <- readRDS("pca_res_joint.RDS")

Getting the annotated data frame for the PCA.

pca.res_joint.annot_df <- get_pca_annot_df(pca.obj = pca.res_joint, sample_id_col = "geo_accession", mdata_df= mdata_subset)
head(pca.res_joint.annot_df)

Visualizing PCA results

Looking at the variance explained by the first 10 PCs.

fviz_eig(pca.res_joint) +
  labs(x = "Principal Component", 
       title = str_wrap("Scree plot for the first 10 principal components for class-specific RMA-normalized data for GSE76275", 60)) +
    theme(title = element_text(size = 10), 
        panel.grid.major = element_blank(),
        panel.grid.minor = element_blank(),
        panel.background = element_blank(),
        axis.line = element_line(colour = "black", size = 0.5))

ggsave("plots/exploration_plots/PCA_classQN_scree.png")
Saving 5.03 x 3.11 in image

Superimposing variables in data upon sample PCA scores. The PCA does separate the TNBC and nonTNBC samples well when class-specific RMA is performed.

ggplot(pca.res_joint.annot_df) + 
  geom_point(mapping = aes(x = PC1, y = PC2, colour = triple_negative_status)) +
    ggtitle(str_wrap("Samples in first two PCs, coloured by triple negative status for GSE76275 after class-specific quantile normalization", 60)) +
  scale_color_npg(name = "Triple Negative Status") +
  guides(colour = guide_legend(override.aes = list(size= 4))) +
  theme(axis.text.x = element_text(angle = 90, size = 7),
               title = element_text(size = 10),
        panel.grid.major = element_blank(),
        panel.grid.minor = element_blank(),
        panel.background = element_blank(),
        axis.line = element_line(colour = "black", size = 0.5))

ggsave("plots/exploration_plots/PCA_classQN_TNBC_status.png")
Saving 5.03 x 3.11 in image

The validation nonTNBC samples are separated from the discovery TNBC and validation TNBC samples.

ggplot(pca.res_joint.annot_df) + 
  geom_point(mapping = aes(x = PC1, y = PC2, colour = set)) +
  ggtitle(str_wrap("Samples in first two PCs, coloured by set (discovery or validation) for GSE76275 after class-specific quantile normalization", 60)) +
  scale_color_aaas(name = "Sample Set") +
  guides(colour = guide_legend(override.aes = list(size= 4))) +
  theme(axis.text.x = element_text(angle = 90, size = 7),
        title = element_text(size = 10),
        panel.grid.major = element_blank(),
        panel.grid.minor = element_blank(),
        panel.background = element_blank(),
        axis.line = element_line(colour = "black", size = 0.5))

ggsave("plots/exploration_plots/PCA_classQN_TNBC_set.png")
Saving 5.03 x 3.11 in image

Submission date is perfectly confounded with TNBC status. May or may not be batch effects.

ggplot(pca.res_joint.annot_df) + 
  geom_point(mapping = aes(x = PC1, y = PC2, colour = submission_date)) +
    ggtitle(str_wrap("Samples in first two PCs, coloured by submission date for GSE76275 after class-specific quantile normalization", 60)) +
  scale_color_npg(name = "Submission Date") +
  guides(colour = guide_legend(override.aes = list(size= 4))) +
  theme(axis.text.x = element_text(angle = 90, size = 7),
               title = element_text(size = 10),
        panel.grid.major = element_blank(),
        panel.grid.minor = element_blank(),
        panel.background = element_blank(),
        axis.line = element_line(colour = "black", size = 0.5))

ggsave("plots/exploration_plots/PCA_classQN_TNBC_date.png")
Saving 5.03 x 3.11 in image

ggplot(pca.res_joint.annot_df) + 
  geom_point(mapping = aes(x = PC1, y = PC2, colour = tnbc_subtype)) +
    ggtitle(str_wrap("Samples in first two PCs, coloured by subtype of TNBC for GSE76275 after class-specific quantile normalization", 60)) +
   scale_color_nejm(name = "TNBC Subtype") +
  guides(colour = guide_legend(override.aes = list(size= 4))) +
  theme(axis.text.x = element_text(angle = 90, size = 7),
               title = element_text(size = 10),
        panel.grid.major = element_blank(),
        panel.grid.minor = element_blank(),
        panel.background = element_blank(),
        axis.line = element_line(colour = "black", size = 0.5),
        legend.text = element_text(size = 5), legend.key.height = unit(x = 0.3, units = "cm"), legend.key.width = unit(x = 0.3, units = "cm")) +
  guides(color = guide_legend(override.aes = list(size = 1)))

ggsave("plots/exploration_plots/PCA_classQN_TNBC_subtype.png")
Saving 5.03 x 3.11 in image

ggplot(pca.res_joint.annot_df) + 
  geom_point(mapping = aes(x = PC1, y = PC2,
                           colour = factor(pr), shape = triple_negative_status)) +
    ggtitle(str_wrap("Samples in first two PCs, coloured by progesterone receptor status for GSE76275 after class-specific quantile normalization", 60)) +
  scale_color_npg(name = "Progesterone Receptor Status") +
  scale_shape_manual(name = "Triple Negative Status", values = c("TN" = 17, "not TN" = 1)) +
  guides(colour = guide_legend(override.aes = list(size= 4))) +
  theme(axis.text.x = element_text(angle = 90, size = 7),
               title = element_text(size = 10),
        panel.grid.major = element_blank(),
        panel.grid.minor = element_blank(),
        panel.background = element_blank(),
        axis.line = element_line(colour = "black", size = 0.5),
        legend.title = element_text(size = 7),
        legend.text = element_text(size = 5), 
        legend.key.height = unit(x = 0.3, units = "cm"),
        legend.key.width = unit(x = 0.3, units = "cm")) +
    guides(color = guide_legend(override.aes = list(size = 1)))


ggsave("plots/exploration_plots/PCA_classQN_pr_GSE76275.png", bg= "white")
Saving 5.03 x 3.11 in image

ggplot(pca.res_joint.annot_df) + 
  geom_point(mapping = aes(x = PC1, y = PC2,
                           colour = factor(her2), shape = triple_negative_status)) +
    ggtitle(str_wrap("Samples in first two PCs, coloured by HER2 amplification status for GSE76275 after class-specific quantile normalization", 60)) +
  scale_color_nejm(name = "HER2 Amplification Status") +
  scale_shape_manual(name = "Triple Negative Status", values = c("TN" = 17, "not TN" = 1)) +
  guides(colour = guide_legend(override.aes = list(size= 4))) +
  theme(axis.text.x = element_text(angle = 90, size = 7),
               title = element_text(size = 10),
        panel.grid.major = element_blank(),
        panel.grid.minor = element_blank(),
        panel.background = element_blank(),
        axis.line = element_line(colour = "black", size = 0.5),
        legend.title = element_text(size = 7),
        legend.text = element_text(size = 5), 
        legend.key.height = unit(x = 0.3, units = "cm"),
        legend.key.width = unit(x = 0.3, units = "cm")) + 
      guides(color = guide_legend(override.aes = list(size = 1)))

ggsave("plots/exploration_plots/PCA_classQN_her2_GSE76275.png", bg = "white")
Saving 5.03 x 3.11 in image

ggplot(pca.res_joint.annot_df) + 
  geom_point(mapping = aes(x = PC1, y = PC2,
                           colour = factor(er), shape = triple_negative_status)) +
    ggtitle(str_wrap("Samples in first two PCs, coloured by estrogen receptor status for GSE76275 after class-specific quantile normalization", 60)) +
  scale_color_npg(name = "Estrogen Receptor Status") +
  scale_shape_manual(name = "Triple Negative Status", values = c("TN" = 17, "not TN" = 1)) +
  guides(colour = guide_legend(override.aes = list(size= 4))) +
  theme(axis.text.x = element_text(angle = 90, size = 7),
               title = element_text(size = 10),
        panel.grid.major = element_blank(),
        panel.grid.minor = element_blank(),
        panel.background = element_blank(),
        axis.line = element_line(colour = "black", size = 0.5),
        legend.title = element_text(size = 7),
        legend.text = element_text(size = 5), 
        legend.key.height = unit(x = 0.3, units = "cm"),
        legend.key.width = unit(x = 0.3, units = "cm")) + 
      guides(color = guide_legend(override.aes = list(size = 1)))


ggsave("plots/exploration_plots/PCA_classQN_er_GSE76275.png")
Saving 5.03 x 3.11 in image

Performing hierarchical clustering

Getting distances

perform_min_max <- function(x){
  mm_transformation <- preProcess(x, method = "range")
  rescaled <- predict(mm_transformation, x)
  return(rescaled)
}

Getting distances after performing min max normalization.

# res_1_dists <- exprs(res_1) %>% 
#   t() %>% 
#   perform_min_max() %>% 
#   dist(method = "euclidean")
  
# saveRDS(res_1_dists, "res_1_dists.RDS")
res_1_dists <- readRDS("res_1_dists.RDS")
# res_joint_dists <- res_joint %>% 
#     t() %>% 
#   perform_min_max() %>% 
#   dist(method = "euclidean")
  
# saveRDS(res_joint_dists, "res_joint_dists.RDS")
res_joint_dists <- readRDS("res_joint_dists.RDS")

Using dendrograms

res_1_dend <- res_1_dists %>% 
  hclust() %>% 
  as.dendrogram()
res_joint_dend <- res_joint_dists %>%
  hclust() %>% 
  as.dendrogram()
library(dendextend)
# res_1_dend %>% 
#   labels()
# res_1_dend %>% 
#   order.dendrogram()
# (res_1 %>% 
#   exprs() %>% 
#   colnames())[28]
  
res_1_dend_laborder <- res_1_dend %>% 
  labels()
mycolors <- ifelse(mdata_subset[res_1_dend_laborder, ]$triple_negative_status == "TN", "forestgreen", "maroon")
par(mar = c(10,2,1,1))
res_1_dend %>% 
  set("labels_cex", 0.1) %>% 
  plot()

colored_bars(colors = mycolors, dend = res_1_dend, rowLabels = "TN Status", add = TRUE)
res_joint_dend_laborder <- res_joint_dend %>% 
  labels()
mycolors <- ifelse(mdata_subset[res_joint_dend_laborder, ]$triple_negative_status == "TN", "forestgreen", "maroon")
par(mar = c(10,2,1,1))
res_joint_dend %>% 
  set("labels_cex", 0.1) %>% 
  plot()

colored_bars(colors = mycolors, dend = res_joint_dend, rowLabels = "TN Status", add = TRUE)

Using heatmaps

Function to process distance object into a distance matrix for heatmap visualization.

get_distmat <- function(x){
  distmat <- as.matrix(x)
  colnames(distmat) <- NULL
  diag(distmat) <- NA
  return(distmat)
}
row_annot <- mdata_subset %>% 
  mutate(er = factor(er), pr = factor(pr), her2 = factor(her2)) %>% 
  select(submission_date, triple_negative_status, pr, er, her2) %>% 
  rename(`TN status` = triple_negative_status)

head(row_annot)
set.seed(5)
row_colours <- list( "TN status" = c("darkgoldenrod4", "darkmagenta"), 
                     "submission_date" = pal_nejm()(2),
                     "pr" = pal_lancet()(9)[1:2], 
                     "er" = pal_lancet()(9)[8:9],
                     "her2" = pal_lancet()(9)[5:7])

names(row_colours[["TN status"]]) <- as.character(unique(row_annot[["TN status"]]))
names(row_colours$pr) <- as.character(unique(row_annot$pr))
names(row_colours$er) <- as.character(unique(row_annot$er))
names(row_colours$her2) <- as.character(unique(row_annot$her2))
names(row_colours$submission_date) <- as.character(unique(row_annot$submission_date))
str(row_colours)
List of 5
 $ TN status      : Named chr [1:2] "darkgoldenrod4" "darkmagenta"
  ..- attr(*, "names")= chr [1:2] "TN" "not TN"
 $ submission_date: Named chr [1:2] "#BC3C29FF" "#0072B5FF"
  ..- attr(*, "names")= chr [1:2] "Dec 17 2015" "Dec 22 2015"
 $ pr             : Named chr [1:2] "#00468BFF" "#ED0000FF"
  ..- attr(*, "names")= chr [1:2] "Negative" "Positive"
 $ er             : Named chr [1:2] "#ADB6B6FF" "#1B1919FF"
  ..- attr(*, "names")= chr [1:2] "Negative" "Positive"
 $ her2           : Named chr [1:3] "#925E9FFF" "#FDAF91FF" "#AD002AFF"
  ..- attr(*, "names")= chr [1:3] "Negative" "Positive" "Not Available"
my_colours <-  viridis(265^2, begin = 1, end = 0)
res_joint_dists %>% 
  get_distmat() %>% 
pheatmap(.,
         color = my_colours,
         annotation_row = row_annot,
         annotation_colors = row_colours,
         show_colnames = F,
         show_rownames = F,
         cutree_rows = 2,
         cutree_cols = 2,
         main = str_wrap("Heatmap of sample distances for class-specific QN expression matrix for GSE76275", 60),
         legend_labels = c("small distance", "large distance"),
         legend_breaks = c(min(., na.rm = TRUE), 
                         max(., na.rm = TRUE)), 
          filename = "plots/exploration_plots/classQN_clustering_heatmap_GSE76275.png")

Performing SVA

Performing SVA on regular RMA data

full_mod <- mdata_subset %>% 
  select(geo_accession, triple_negative_status) %>% 
  arrange(triple_negative_status) %>% 
  model.matrix(~triple_negative_status, data = .)

head(full_mod)
           (Intercept) triple_negative_statusTN
GSM1978883           1                        0
GSM1978884           1                        0
GSM1978885           1                        0
GSM1978886           1                        0
GSM1978887           1                        0
GSM1978888           1                        0
red_mod <- model.matrix(~1, data = mdata_subset)

head(red_mod)
           (Intercept)
GSM1974566           1
GSM1974567           1
GSM1974568           1
GSM1974569           1
GSM1974570           1
GSM1974571           1

Get number of significant surrogate variables.

n.sv.wholeQN <- num.sv(exprs(res_1), full_mod, method="leek")
n.sv.wholeQN
[1] 0
svobj.wholeQN <- sva(exprs(res_1), mod = full_mod, mod0 = red_mod, n.sv = 1)
sv_df.wholeQN <- tibble("geo_accession" = colnames(exprs(res_1)), "sv" = svobj.wholeQN$sv)

head(sv_df.wholeQN)
left_join(sv_df.wholeQN, mdata, by = "geo_accession") %>% 
  mutate(index = 5) %>% 
  ggplot() +
  # geom_col(mapping = aes(y = fct_reorder(geo_accession, sv, .fun = function(x){x}), x = sv, fill = set)) +
  geom_boxplot(mapping = aes(x = submission_date, y = sv, fill = set)) +
  theme_light() +
  labs(y = "Surrogate Variable Value", title = "Distribution of latent variable estimated by SVA for different grouping factors")
  

# ggsave("plots/exploration_plots/sva_grouping_normalRMA.png")

Performing SVA on class-specific quantile normalized data

Create full model matrix.

full_mod <- mdata_subset %>% 
  select(geo_accession, triple_negative_status) %>% 
  arrange(triple_negative_status) %>% 
  model.matrix(~triple_negative_status, data = .)

head(full_mod)
           (Intercept) triple_negative_statusTN
GSM1978883           1                        0
GSM1978884           1                        0
GSM1978885           1                        0
GSM1978886           1                        0
GSM1978887           1                        0
GSM1978888           1                        0

Create reduced model matrix.

red_mod <- model.matrix(~1, data = mdata_subset)

head(red_mod)
           (Intercept)
GSM1974566           1
GSM1974567           1
GSM1974568           1
GSM1974569           1
GSM1974570           1
GSM1974571           1

Get number of significant surrogate variables.

n.sv.classQN <- num.sv(res_joint, full_mod, method="leek")
n.sv.classQN
[1] 1

Perform SVA on classQN-normalized expression matrix.

svobj.classQN <- sva(res_joint, mod = full_mod, mod0 = red_mod, n.sv = n.sv.classQN)
Number of significant surrogate variables is:  1 
Iteration (out of 5 ):1  2  3  4  5  
sv_df.classQN <- tibble("geo_accession" = colnames(res_joint), "sv" = svobj.classQN$sv)

head(sv_df.classQN)
saveRDS(sv_df.classQN, "sv_df_classQN.RDS")
# sv_df.classQN <- readRDS("sv_df_classQN.RDS")
sv_df.classQN %>% 
ggplot() +
  geom_boxplot(mapping = aes(x = submission_date, y = sv, fill = er)) +
  # geom_point(mapping = aes(x = submission_date, y = sv, color = er)) +
  theme_light() 

  # labs(y = "Surrogate Variable Value", title = "Distribution of latent variable estimated by SVA for different grouping factors")
  

# ggsave("plots/exploration_plots/sva_grouping_classQN.png")

Trying to see if the SVA estimates a batch when QN is not applied

In this attempt, I perform no quantile normalization while performing RMA. If QN has not been performed and a surrogate variable shows up that corresponds to batch, batch effects are probably present.

rawData.summary <- rma(rawData, background = TRUE, normalize = FALSE)
rawData.summary_df_long <- rawData.summary %>% 
  exprs() %>% 
  as_tibble(rownames = "probeID") %>% 
  pivot_longer(cols = all_of(c(tnbc_samples, nontnbc_samples)), names_to = "sample_id", 
               values_to = "intensity") %>% 
  left_join(., mdata_subset, by = c("sample_id" = "geo_accession"))
p3 <- rawData.summary_df_long %>% 
  ggplot() +
  geom_boxplot(mapping = aes(x = reorder(sample_id, as.numeric(set)), y = intensity, 
                             color = set)) +
  labs(x = "samples", 
       title = str_wrap("Sample-wise log2 intensity boxplots in the absence of QN", 60)) +
  scale_color_npg() +
  theme(axis.text.x = element_blank())

p3
ggsave("plots/exploration_plots/GSE76275_noQN_boxplots.png", 
       p3, 
       units = "cm", width = 30, height = 10)

Getting the number of surrogate variables in the absence of quantile normalization.

n.sv.nonorm <- num.sv(exprs(rawData.summary), full_mod, method="leek")

There is one surrogate variable present in the absence of QN.

n.sv.nonorm
svobj.nonorm <- sva(exprs(rawData.summary), mod = full_mod, mod0 = red_mod, n.sv = n.sv.nonorm)
sv_df.nonorm <- tibble("geo_accession" = colnames(exprs(rawData.summary)), "sv" = svobj.nonorm$sv)

head(sv_df.nonorm)
left_join(sv_df.nonorm, mdata, by = "geo_accession") %>% 
  mutate(index = 5) %>% 
  ggplot() +
  # geom_col(mapping = aes(y = fct_reorder(geo_accession, sv, .fun = function(x){x}), x = sv, fill = set)) +
  geom_boxplot(mapping = aes(x = submission_date, y = sv, fill = set)) +
  theme_light() +
  labs(y = "Surrogate Variable Value", 
       title = str_wrap("Distribution of latent variable estimated by SVA for different grouping factors", 60))

ggsave("plots/exploration_plots/sva_grouping_noQN.png")
---
title: "Explore GSE76275"
output: 
  html_notebook:
    toc: true
    toc_depth: 2
    toc_float: true
---

# Loading libraries

```{r}
library(GEOquery)
library(oligo)
library(sva)
library(tidyverse)
library(ggsci)
library(factoextra)
library(pheatmap)
library(dendextend)
library(caret)
library(RColorBrewer)
library(viridis)
library(UpSetR)
library(ComplexUpset)
```


# Custom functions

```{r}
# given a matrix, perform min-max scaling on its columns
min_max_mat <- function(mat){
  mat_rescaled <- apply(mat, 2, function(v){
    v_range <- range(v)
    names(v_range) <- c("minimum", "maximum")
    range_difference <- v_range["maximum"] - v_range["minimum"]
    rescaled <- (v - v_range["minimum"])/range_difference
    return(rescaled)
  })
  return(mat_rescaled)
}
```

# Getting data from GEOquery

```{r}
# geodata <- GEOquery::getGEO(GEO = "GSE76275", destdir = "./tempfiles")
# geodata <- GEOquery::getGEO(filename = "./tempfiles/GSE76275_series_matrix.txt.gz")
```


```{r}
# saveRDS(geodata, "geodata.RDS")
geodata <- readRDS("geodata.RDS")
```


```{r}
# mdata <- geodata %>% 
#   pluck(1) %>% 
#   phenoData() %>%
#   pData() %>% as_tibble()
```


```{r}
# feature_data <- geodata %>% 
#   pluck(1) %>% 
#   featureData()
  
```


```{r}
# write_csv(mdata, "raw_mdata.csv")
mdata <- read_csv("raw_mdata.csv")
```


```{r}
# saveRDS(feature_data, "featureData.RDS")
# feature_data <- readRDS("featureData.RDS")
```

# Inspecting and cleaning the metadata

```{r}
mdata %>% 
  glimpse()
```


```{r}
mdata <- mdata %>% 
  select(title, contains("date"), geo_accession, contains(":ch1"))

colnames(mdata)
  
```


```{r}
cnames <- colnames(mdata)
```


```{r}
cnames_processed <- str_split(cnames, pattern = ":") %>% 
  map_chr(~{.x[[1]]}) %>% 
  str_replace_all(" ", "_") %>% 
  str_replace_all("-", "_") %>% 
  str_remove_all("\\(|\\)|,")

cnames_processed
```


```{r}
colnames(mdata) <- cnames_processed
rm(cnames, cnames_processed)
```


```{r}
glimpse(mdata)
```

```{r}
mdata <- mdata %>% 
  mutate(her2 = if_else(!is.na(her2), her2, "Not Available")) %>% 
  mutate(er = factor(er, levels = c("Negative", "Positive")), 
         pr = factor(pr, levels = c("Negative", "Positive")), 
         her2 = factor(her2, levels = c("Negative", "Positive", "Not Available"))) %>% 
  select(geo_accession, everything())
head(mdata) 
```

# Reading in raw probe intensity data

Celfiles downloaded from GEO and kept the folder celfiles/

```{r}
celFiles <- list.celfiles('celfiles/', full.names = TRUE, listGzipped = TRUE)
celFiles %>% head()
```



```{r}
names(celFiles) <- celFiles %>% 
  basename() %>% 
  str_split("\\.") %>% 
  map_chr(~{.x[1]}) %>% 
  str_split("_") %>% 
  map_chr(~{.x[1]}) 

head(celFiles)
```

Rearranging rows of metadata to match order of samples in `celFiles`.

```{r}
mdata <- mdata[match(mdata$geo_accession, names(celFiles)), ]
```


Getting only the relevant variables from the metadata.

```{r}
mdata_subset <- mdata %>%
  select(geo_accession, 
         title, 
         triple_negative_status, 
         tnbc_subtype,
         submission_date,
         er,
         her2,
         pr,
         race,
         set,
         gender, 
         age_years) %>% 
  mutate(across(where(is.character), .fns = factor)) %>% 
  mutate(tnbc_subtype = if_else(is.na(as.character(tnbc_subtype)), "Not Applicable", as.character(tnbc_subtype))) %>% 
  mutate(tnbc_subtype = factor(tnbc_subtype)) %>% 
  as.data.frame()


rownames(mdata_subset) <- as.character(mdata_subset$geo_accession)

head(mdata_subset)

```

```{r}
# rawData <- read.celfiles(celFiles, phenoData = AnnotatedDataFrame(mdata_subset))
```


```{r}
# saveRDS(object = rawData, "rawData.RDS")
rawData <- readRDS("rawData.RDS")
```


  Looking at the dimensions of the raw expression matrix.

```{r}
exprs(rawData) %>% dim()
```

# Plotting some metadata attributes

Looking at the number of samples for triple negative status and for set.

```{r}
mdata_subset %>% 
  count(triple_negative_status, set)
```



```{r}
mdata_subset %>% 
  count(triple_negative_status) %>% 
  mutate(proportion = round(n/sum(n), 3)) %>% 
  ggplot() +
  geom_col(mapping = aes(y = "dummy_group",
                         x = proportion,
                         fill = triple_negative_status)) +
    theme(axis.text.x = element_text(angle = 90, size = 7),
          axis.text.y = element_blank(),
          axis.ticks.y = element_blank(),
          axis.title.y = element_blank(),
          title = element_text(size = 10),
          panel.grid.major = element_blank(),
          panel.grid.minor = element_blank(),
          panel.background = element_blank(),
          axis.line = element_line(colour = "black", size = 0.5),
          legend.direction = "horizontal", legend.position = "top") +
  geom_text(aes(y = 1, 
                x = proportion, 
                label = proportion, 
                group = triple_negative_status), 
            size = 5, 
            position = position_stack(vjust = 0.5), 
            color = "white") +
  scale_fill_npg(name = "Triple Negative Status") +
  labs(x = "Proportion",
       title = str_wrap("Proportions of TNBC status values for GSE76275", 60))

ggsave(filename = "plots/exploration_plots/GSE76275_tnbc_proportion_barplot.png")
```

```{r}
mdata_subset %>% 
  count(triple_negative_status, pr) %>% 
  mutate(proportion = round(n/sum(n), 3)) %>% 
  ggplot() +
  geom_col(mapping = aes(x = pr,
                         y = proportion,
                         fill = triple_negative_status)) +
    geom_text(aes(x = pr, 
                y = proportion, 
                label = proportion, 
                group = triple_negative_status), 
            size = 3, 
            position = position_stack(vjust = 0.5), 
            color = "white") +
    theme(title = element_text(size = 10),
          panel.grid.major = element_blank(),
          panel.grid.minor = element_blank(),
          panel.background = element_blank(),
          axis.line = element_line(colour = "black", size = 0.5),
          legend.direction = "vertical", legend.position = "right") +
  scale_fill_npg(name = "Triple Negative Status") +
  labs(x = "Progesterone Receptor Status",
       y = "Proportion",
       title = str_wrap("Proportions of progesterone receptor status values for GSE76275", 60))

ggsave(filename = "plots/exploration_plots/GSE76275_pr_proportion_barplot.png")
```


```{r}
mdata_subset %>% 
  count(triple_negative_status, er) %>% 
  mutate(proportion = round(n/sum(n), 3)) %>% 
  ggplot() +
  geom_col(mapping = aes(x = er,
                         y = proportion,
                         fill = triple_negative_status)) +
      geom_text(aes(x = er, 
                y = proportion, 
                label = proportion, 
                group = triple_negative_status), 
            size = 3, 
            position = position_stack(vjust = 0.5), 
            color = "white") +
    theme(title = element_text(size = 10),
          panel.grid.major = element_blank(),
          panel.grid.minor = element_blank(),
          panel.background = element_blank(),
          axis.line = element_line(colour = "black", size = 0.5),
          legend.direction = "vertical", legend.position = "right") +
  scale_fill_npg(name = "Triple Negative Status") +
  labs(x = "Estrogen Receptor Status",
       y = "Proportion",
       title = str_wrap("Proportions of estrogen receptor status values for GSE76275", 60))

ggsave(filename = "plots/exploration_plots/GSE76275_er_proportion_barplot.png")
```

```{r}
mdata_subset %>% 
  count(triple_negative_status, her2) %>% 
  mutate(proportion = round(n/sum(n), 3)) %>% 
  ggplot() +
  geom_col(mapping = aes(x = her2,
                         y = proportion,
                         fill = triple_negative_status)) +
    geom_text(aes(x = her2, 
                y = proportion, 
                label = proportion, 
                group = triple_negative_status), 
            size = 3, 
            position = position_stack(vjust = 0.5), 
            color = "white") +
    theme(title = element_text(size = 10),
          panel.grid.major = element_blank(),
          panel.grid.minor = element_blank(),
          panel.background = element_blank(),
          axis.line = element_line(colour = "black", size = 0.5),
          legend.direction = "vertical", legend.position = "right") +
  scale_fill_npg(name = "Triple Negative Status") +
  labs(x = "HER2 Amplification Status",
       y = "Proportion",
       title = str_wrap("Proportions of HER2 amplification status values for GSE76275", 60))

ggsave(filename = "plots/exploration_plots/GSE76275_her2_proportion_barplot.png")
```



```{r}
list("ER" = mdata_subset$geo_accession[mdata_subset$er == "Positive"],
     "PR" = mdata_subset$geo_accession[mdata_subset$pr == "Positive"],
     "HER2" = mdata_subset$geo_accession[mdata_subset$her2 == "Positive"]) %>%
  fromList(.) %>% 
  upset(., c("ER", "PR", "HER2"), width_ratio = 0.2) +
  ggtitle(str_wrap("Upset plot for different combinations of ER, PR, and HER2 status in the non-TNBC samples in GSE76275", 60)) +
  theme(title = element_text(size = 7))

ggsave("plots/exploration_plots/GSE76275_nonTNBC_upset.png")
```

Reordering the columns in the metadata.

```{r}
mdata <- select(mdata, geo_accession, everything())
head(mdata)
```


# Performing RMA

## Using regular RMA on data (without separating by class)

```{r}
# res_1 <- rma(rawData)
```


```{r}
# saveRDS(object = res_1, "res_1.RDS")
res_1 <- readRDS("res_1.RDS")
```


```{r}
exprs(res_1) %>% 
  dim()
```


```{r}
exprs(res_1)[1:5, 1:5]
```


## Performing class-specific RMA by reading in the expression sets separately


Getting lists of the TNBC samples and the non-TNBC samples.

```{r}
tnbc_samples <- mdata_subset %>% 
  filter(triple_negative_status == "TN") %>% 
  select(geo_accession) %>% 
  unlist(use.names = F) %>% 
  as.character()

head(tnbc_samples)

nontnbc_samples <- mdata_subset %>% 
  filter(triple_negative_status == "not TN") %>% 
  select(geo_accession) %>% 
  unlist(use.names = F) %>% 
  as.character()

head(nontnbc_samples)
```


Creating different metadata tables for TNBC and nonTNBC.

```{r}
mdata_subset_tnbc <- mdata_subset[tnbc_samples, ]
dim(mdata_subset_tnbc)
mdata_subset_nontnbc <- mdata_subset[nontnbc_samples, ]
dim(mdata_subset_nontnbc)
```


Reading in the TNBC files.

```{r}
# rawData_tnbc <- read.celfiles(filenames = celFiles[tnbc_samples], 
#                               phenoData = AnnotatedDataFrame(mdata_subset_tnbc))
# 
# rawData_tnbc
```


```{r}
# saveRDS(rawData_tnbc, file = "rawData_tnbc.RDS")
rawData_tnbc <- readRDS(file = "rawData_tnbc.RDS")
```

```{r}
rawData_tnbc
```


Reading in the nonTNBC files.

```{r}
# rawData_nontnbc <- read.celfiles(filenames = celFiles[nontnbc_samples], 
#                               phenoData = AnnotatedDataFrame(mdata_subset_nontnbc))
# 
# rawData_nontnbc
```



```{r}
# saveRDS(rawData_nontnbc, file = "rawData_nontnbc.RDS")
rawData_nontnbc <- readRDS(file = "rawData_nontnbc.RDS")
```


```{r}
rawData_nontnbc
```


Performing RMA on TNBC data.

```{r}
# res_tnbc <- rma(rawData_tnbc)
```


```{r}
# saveRDS(res_tnbc, file = "res_tnbc.RDS")
res_tnbc <- readRDS(file = "res_tnbc.RDS")
```


Performing RMA on nonTNBC data.

```{r}
# res_nontnbc <- rma(rawData_nontnbc)
```


```{r}
# saveRDS(res_nontnbc, file = "res_nontnbc.RDS")
res_nontnbc <- readRDS(file = "res_nontnbc.RDS")
```


Combining the expression matrices of TNBC and nonTNBC data after separate RMA.

```{r}
res_joint <- cbind(exprs(res_tnbc), exprs(res_nontnbc))
```


```{r}
res_joint[1:5, 1:5]
```

# Saving certain CSV files for everyone else to refer to

Saving the joint expression matrix from class-specific QN.

```{r}
res_joint %>% 
  as_tibble(rownames = "probe_id") %>% 
  write_csv("dataframe_files/post_classQN_expression.csv")
```

Saving a subset of the metadata that I think is relevant.

```{r}
mdata_subset %>% 
  write_csv("dataframe_files/metadata_subset.csv")
```


Saving the TNBC and nonTNBC metadata separately, just in case.

```{r}
mdata_subset_tnbc %>% 
  write_csv("dataframe_files/metadata_subset_tnbc.csv")
```


```{r}
mdata_subset_nontnbc %>% 
  write_csv("dataframe_files/metadata_subset_nontnbc.csv")
```


# Getting sample-specific boxplots

## Sample specific boxplots for regular RMA QN


```{r}
res_1_df_long <- res_1 %>%
  exprs() %>% 
  as_tibble(rownames = "probeID") %>% 
  pivot_longer(cols = all_of(c(tnbc_samples, nontnbc_samples)), names_to = "sample_id", 
               values_to = "intensity") %>% 
  left_join(., mdata_subset, by = c("sample_id" = "geo_accession"))
```


```{r}
# saveRDS(object = res_1_df_long, "res_1_df_long.RDS")
res_1_df_long <- readRDS("res_1_df_long.RDS")
```


```{r}
p2 <- res_1_df_long %>% 
  ggplot() +
  geom_boxplot(mapping = aes(x = reorder(sample_id, as.numeric(set)), y = intensity, color = set), outlier.size = 0.2)
```


```{r}
p2 <- p2 + labs(x = "samples", 
       title = str_wrap("Sample-wise log2 intensity boxplots for global quantile normalization for GSE76275", 60)) +
  scale_color_npg(name = "Triple Negative Status") +
  theme_light() +
  theme(axis.text.x = element_blank(),
        axis.ticks.x = element_blank(),
        title = element_text(size = 10),
        legend.position = "top", 
        legend.direction = "horizontal")
p2
  
```


```{r}
ggsave("plots/exploration_plots/GSE76275_post_regQN_boxplots.png", 
       p2, 
       units = "cm", 
       width = 30, 
       height = 10)
```


```{r}
rm(res_1_df_long)
```


## Sample specific boxplots for classQN


```{r}
res_joint_df_long <- res_joint %>% 
  as_tibble(rownames = "probeID") %>% 
  pivot_longer(cols = all_of(c(tnbc_samples, nontnbc_samples)), names_to = "sample_id", 
               values_to = "intensity")
  
```


```{r}
# saveRDS(object = res_joint_df_long, "res_joint_df_long.RDS")
res_joint_df_long <- readRDS("res_joint_df_long.RDS")
```



```{r}
p1 <- res_joint_df_long %>% 
  left_join(., mdata_subset, by = c("sample_id" = "geo_accession")) %>% 
  mutate(sample_id = factor(sample_id)) %>% 
  ggplot() +
   geom_boxplot(mapping = aes(x = reorder(sample_id, as.numeric(set)), y = intensity, color = set), outlier.size = 0.2)
```


```{r}
p1 <- p1 + labs(x = "samples", 
       title = str_wrap("Sample-wise log2 intensity boxplots for class-specific quantile normalization for GSE76275", 60)) +
scale_color_npg(name = "Triple Negative Status") +
  theme_light() +
  theme(axis.text.x = element_blank(),
        axis.ticks.x = element_blank(),
        title = element_text(size = 10),
        legend.position = "top", 
        legend.direction = "horizontal")

p1 
```



```{r}
ggsave("plots/exploration_plots/GSE76275_post_classQN_boxplots.png", 
       p1, 
       units = "cm", width = 20, height = 10)
```


```{r}
res_joint_df_long %>% 
  left_join(., mdata_subset, by = c("sample_id" = "geo_accession")) %>% 
  mutate(sample_id = factor(sample_id)) %>% 
  ggplot() +
   geom_boxplot(mapping = aes(x = reorder(sample_id, as.numeric(set)), y = intensity, fill = set), outlier.size = 0.2) +
labs(x = "samples", 
       title = str_wrap("Sample-wise log2 intensity boxplots for class-specific quantile normalization for GSE76275", 60)) +
scale_fill_npg(name = "Triple Negative Status") +
  theme_light() +
  theme(axis.text.x = element_blank(),
        axis.ticks.x = element_blank(),
        title = element_text(size = 10),
        legend.position = "right", 
        legend.direction = "vertical")

ggsave("plots/exploration_plots/GSE76275_post_classQN_boxplots_bad.png", units = "cm", width = 20, height = 10)
```


# Performing PCA

## Custom functions

Function to create an annotated data frame by combining PC scores as well as metadata: useful for ggplot visualization.

```{r}
get_pca_annot_df <- function(pca.obj, sample_id_col, mdata_df){
  ind_scores <- pca.obj$x
  ind_scores_reordered <- ind_scores[match(rownames(ind_scores), mdata_df[[sample_id_col]]), ] %>% 
    as_tibble(rownames = sample_id_col) %>% 
    mutate(filename = factor(!!sym(sample_id_col)))
  ind_scores_annot <- left_join(ind_scores_reordered, y = mdata_df, by = sample_id_col) %>% 
  select(all_of(colnames(mdata_subset)), contains("PC"))
  return(ind_scores_annot)
}
```


## Performing PCA on regular RMA data

```{r}
# pca.res_1 <- res_1 %>% 
#   exprs() %>% 
#   t() %>% 
#   prcomp(center = TRUE, scale = TRUE)
```


```{r}
# saveRDS(pca.res_1, "pca_res1.RDS")
pca.res_1 <- readRDS("pca_res1.RDS")
```


Getting the annotated data frame for the PCA.

```{r}
pca.res_1.annot_df <- get_pca_annot_df(pca.obj = pca.res_1, sample_id_col = "geo_accession", mdata_df= mdata_subset)
head(pca.res_1.annot_df)
```

### Visualizing PCA results

Looking at the variance explained by the first 10 PCs.

```{r}
fviz_eig(pca.res_1) +
  labs(x = "Principal Component", 
       title = str_wrap("Scree plot for the first 10 principal components for global RMA-normalized data for GSE76275", 60)) +
    theme(title = element_text(size = 10), 
        panel.grid.major = element_blank(),
        panel.grid.minor = element_blank(),
        panel.background = element_blank(),
        axis.line = element_line(colour = "black", size = 0.5))

ggsave("plots/exploration_plots/PCA_wholeQN_scree.png", bg = "white")
```

Superimposing variables in data upon sample PCA scores.
The PCA does not seem to separate the TNBC and nonTNBC samples that well when regular RMA is performed.

```{r}
ggplot(pca.res_1.annot_df) + 
  geom_point(mapping = aes(x = PC1, y = PC2, colour = triple_negative_status)) +
    ggtitle(str_wrap("Samples in first two PCs, coloured by triple negative status for GSE76275 after global quantile normalization", 60)) +
  scale_color_npg(name = "Triple Negative Status") +
  guides(colour = guide_legend(override.aes = list(size= 4))) +
  theme(axis.text.x = element_text(angle = 90, size = 7),
               title = element_text(size = 10),
        panel.grid.major = element_blank(),
        panel.grid.minor = element_blank(),
        panel.background = element_blank(),
        axis.line = element_line(colour = "black", size = 0.5),
        legend.background = )


ggsave("plots/exploration_plots/PCA_wholeQN_TNBC_status.png", bg = "white")
  
```



The samples do not seem to separate well by set either.

```{r}
ggplot(pca.res_1.annot_df) + 
  geom_point(mapping = aes(x = PC1, y = PC2, colour = set)) +
  ggtitle(str_wrap("Samples in first two PCs, coloured by set (discovery or validation) for GSE76275 after global quantile normalization", 60)) +
  scale_color_aaas(name = "Sample Set") +
  guides(colour = guide_legend(override.aes = list(size= 4))) +
  theme(axis.text.x = element_text(angle = 90, size = 7),
               title = element_text(size = 10),
        panel.grid.major = element_blank(),
        panel.grid.minor = element_blank(),
        panel.background = element_blank(),
        axis.line = element_line(colour = "black", size = 0.5))

ggsave("plots/exploration_plots/PCA_wholeQN_set.png", bg = "white")
```

There does not seem to be too strong of a batch effect according to submission date.

```{r}
ggplot(pca.res_1.annot_df) + 
  geom_point(mapping = aes(x = PC1, y = PC2, colour = submission_date)) +
    ggtitle("Samples in first two PCs, \ncoloured by submission date for whole QN") +
  guides(colour = guide_legend(override.aes = list(size= 4))) +
  theme(axis.text.x = element_text(angle = 90, size = 7),
               title = element_text(size = 10),
        panel.grid.major = element_blank(),
        panel.grid.minor = element_blank(),
        panel.background = element_blank(),
        axis.line = element_line(colour = "black", size = 0.5))

ggsave("plots/exploration_plots/PCA_wholeQN_set.png")
```


```{r}
ggplot(pca.res_1.annot_df) + 
  geom_point(mapping = aes(x = PC1, y = PC2, colour = tnbc_subtype)) +
    ggtitle("Samples in first two PCs, \ncoloured by tnbc_subtype for whole QN") +
  guides(colour = guide_legend(override.aes = list(size= 4))) +
  theme(axis.text.x = element_text(angle = 90, size = 7),
               title = element_text(size = 10),
        panel.grid.major = element_blank(),
        panel.grid.minor = element_blank(),
        panel.background = element_blank(),
        axis.line = element_line(colour = "black", size = 0.5), legend.position = "right", legend.direction = "vertical", legend.key.width = unit(x = 0.5, units = "cm")) 
```

## Performing PCA on separately-performed RMA data

```{r}
pca.res_joint <- res_joint %>% 
  t() %>% 
  prcomp(center = TRUE, scale = TRUE)
```


```{r}
# saveRDS(pca.res_joint, "pca_res_joint.RDS")
pca.res_joint <- readRDS("pca_res_joint.RDS")
```


Getting the annotated data frame for the PCA.

```{r}
pca.res_joint.annot_df <- get_pca_annot_df(pca.obj = pca.res_joint, sample_id_col = "geo_accession", mdata_df= mdata_subset)
head(pca.res_joint.annot_df)
```

### Visualizing PCA results

Looking at the variance explained by the first 10 PCs.

```{r}
fviz_eig(pca.res_joint) +
  labs(x = "Principal Component", 
       title = str_wrap("Scree plot for the first 10 principal components for class-specific RMA-normalized data for GSE76275", 60)) +
    theme(title = element_text(size = 10), 
        panel.grid.major = element_blank(),
        panel.grid.minor = element_blank(),
        panel.background = element_blank(),
        axis.line = element_line(colour = "black", size = 0.5))

ggsave("plots/exploration_plots/PCA_classQN_scree.png")
```

Superimposing variables in data upon sample PCA scores.
The PCA **does** separate the TNBC and nonTNBC samples well when class-specific RMA is performed.

```{r}
ggplot(pca.res_joint.annot_df) + 
  geom_point(mapping = aes(x = PC1, y = PC2, colour = triple_negative_status)) +
    ggtitle(str_wrap("Samples in first two PCs, coloured by triple negative status for GSE76275 after class-specific quantile normalization", 60)) +
  scale_color_npg(name = "Triple Negative Status") +
  guides(colour = guide_legend(override.aes = list(size= 4))) +
  theme(axis.text.x = element_text(angle = 90, size = 7),
               title = element_text(size = 10),
        panel.grid.major = element_blank(),
        panel.grid.minor = element_blank(),
        panel.background = element_blank(),
        axis.line = element_line(colour = "black", size = 0.5))

ggsave("plots/exploration_plots/PCA_classQN_TNBC_status.png")
```
The validation nonTNBC samples are separated from the discovery TNBC and validation TNBC samples.

```{r}
ggplot(pca.res_joint.annot_df) + 
  geom_point(mapping = aes(x = PC1, y = PC2, colour = set)) +
  ggtitle(str_wrap("Samples in first two PCs, coloured by set (discovery or validation) for GSE76275 after class-specific quantile normalization", 60)) +
  scale_color_aaas(name = "Sample Set") +
  guides(colour = guide_legend(override.aes = list(size= 4))) +
  theme(axis.text.x = element_text(angle = 90, size = 7),
        title = element_text(size = 10),
        panel.grid.major = element_blank(),
        panel.grid.minor = element_blank(),
        panel.background = element_blank(),
        axis.line = element_line(colour = "black", size = 0.5))

ggsave("plots/exploration_plots/PCA_classQN_TNBC_set.png")
```

Submission date is perfectly confounded with TNBC status. May or may not be batch effects.

```{r}
ggplot(pca.res_joint.annot_df) + 
  geom_point(mapping = aes(x = PC1, y = PC2, colour = submission_date)) +
    ggtitle(str_wrap("Samples in first two PCs, coloured by submission date for GSE76275 after class-specific quantile normalization", 60)) +
  scale_color_npg(name = "Submission Date") +
  guides(colour = guide_legend(override.aes = list(size= 4))) +
  theme(axis.text.x = element_text(angle = 90, size = 7),
               title = element_text(size = 10),
        panel.grid.major = element_blank(),
        panel.grid.minor = element_blank(),
        panel.background = element_blank(),
        axis.line = element_line(colour = "black", size = 0.5))

ggsave("plots/exploration_plots/PCA_classQN_TNBC_date.png")
```



```{r}
ggplot(pca.res_joint.annot_df) + 
  geom_point(mapping = aes(x = PC1, y = PC2, colour = tnbc_subtype)) +
    ggtitle(str_wrap("Samples in first two PCs, coloured by subtype of TNBC for GSE76275 after class-specific quantile normalization", 60)) +
   scale_color_nejm(name = "TNBC Subtype") +
  guides(colour = guide_legend(override.aes = list(size= 4))) +
  theme(axis.text.x = element_text(angle = 90, size = 7),
               title = element_text(size = 10),
        panel.grid.major = element_blank(),
        panel.grid.minor = element_blank(),
        panel.background = element_blank(),
        axis.line = element_line(colour = "black", size = 0.5),
        legend.text = element_text(size = 5), 
        legend.key.height = unit(x = 0.3, units = "cm"),
        legend.key.width = unit(x = 0.3, units = "cm")) +
  guides(color = guide_legend(override.aes = list(size = 1)))

ggsave("plots/exploration_plots/PCA_classQN_TNBC_subtype.png")
```

```{r}
ggplot(pca.res_joint.annot_df) + 
  geom_point(mapping = aes(x = PC1, y = PC2,
                           colour = factor(pr), shape = triple_negative_status)) +
    ggtitle(str_wrap("Samples in first two PCs, coloured by progesterone receptor status for GSE76275 after class-specific quantile normalization", 60)) +
  scale_color_npg(name = "Progesterone Receptor Status") +
  scale_shape_manual(name = "Triple Negative Status", values = c("TN" = 17, "not TN" = 1)) +
  guides(colour = guide_legend(override.aes = list(size= 4))) +
  theme(axis.text.x = element_text(angle = 90, size = 7),
               title = element_text(size = 10),
        panel.grid.major = element_blank(),
        panel.grid.minor = element_blank(),
        panel.background = element_blank(),
        axis.line = element_line(colour = "black", size = 0.5),
        legend.title = element_text(size = 7),
        legend.text = element_text(size = 5), 
        legend.key.height = unit(x = 0.3, units = "cm"),
        legend.key.width = unit(x = 0.3, units = "cm")) +
    guides(color = guide_legend(override.aes = list(size = 1)))


ggsave("plots/exploration_plots/PCA_classQN_pr_GSE76275.png", bg= "white")
```

```{r}
ggplot(pca.res_joint.annot_df) + 
  geom_point(mapping = aes(x = PC1, y = PC2,
                           colour = factor(her2), shape = triple_negative_status)) +
    ggtitle(str_wrap("Samples in first two PCs, coloured by HER2 amplification status for GSE76275 after class-specific quantile normalization", 60)) +
  scale_color_nejm(name = "HER2 Amplification Status") +
  scale_shape_manual(name = "Triple Negative Status", values = c("TN" = 17, "not TN" = 1)) +
  theme(axis.text.x = element_text(angle = 90, size = 7),
               title = element_text(size = 10),
        panel.grid.major = element_blank(),
        panel.grid.minor = element_blank(),
        panel.background = element_blank(),
        axis.line = element_line(colour = "black", size = 0.5),
        legend.title = element_text(size = 7),
        legend.text = element_text(size = 5), 
        legend.key.height = unit(x = 0.3, units = "cm"),
        legend.key.width = unit(x = 0.3, units = "cm")) + 
      guides(color = guide_legend(override.aes = list(size = 1)))

ggsave("plots/exploration_plots/PCA_classQN_her2_GSE76275.png", bg = "white")
```

```{r}
ggplot(pca.res_joint.annot_df) + 
  geom_point(mapping = aes(x = PC1, y = PC2,
                           colour = factor(er), shape = triple_negative_status)) +
    ggtitle(str_wrap("Samples in first two PCs, coloured by estrogen receptor status for GSE76275 after class-specific quantile normalization", 60)) +
  scale_color_npg(name = "Estrogen Receptor Status") +
  scale_shape_manual(name = "Triple Negative Status", values = c("TN" = 17, "not TN" = 1)) +
  guides(colour = guide_legend(override.aes = list(size= 4))) +
  theme(axis.text.x = element_text(angle = 90, size = 7),
               title = element_text(size = 10),
        panel.grid.major = element_blank(),
        panel.grid.minor = element_blank(),
        panel.background = element_blank(),
        axis.line = element_line(colour = "black", size = 0.5),
        legend.title = element_text(size = 7),
        legend.text = element_text(size = 5), 
        legend.key.height = unit(x = 0.3, units = "cm"),
        legend.key.width = unit(x = 0.3, units = "cm")) + 
      guides(color = guide_legend(override.aes = list(size = 1)))


ggsave("plots/exploration_plots/PCA_classQN_er_GSE76275.png")
```

# Performing hierarchical clustering

## Getting distances

```{r}
perform_min_max <- function(x){
  mm_transformation <- preProcess(x, method = "range")
  rescaled <- predict(mm_transformation, x)
  return(rescaled)
}
```


Getting distances after performing min max normalization.


```{r}
# res_1_dists <- exprs(res_1) %>% 
#   t() %>% 
#   perform_min_max() %>% 
#   dist(method = "euclidean")
  
```


```{r}
# saveRDS(res_1_dists, "res_1_dists.RDS")
res_1_dists <- readRDS("res_1_dists.RDS")
```



```{r}
# res_joint_dists <- res_joint %>% 
#     t() %>% 
#   perform_min_max() %>% 
#   dist(method = "euclidean")
  
```


```{r}
# saveRDS(res_joint_dists, "res_joint_dists.RDS")
res_joint_dists <- readRDS("res_joint_dists.RDS")
```



## Using dendrograms

```{r}
res_1_dend <- res_1_dists %>% 
  hclust() %>% 
  as.dendrogram()
```


```{r}
res_joint_dend <- res_joint_dists %>%
  hclust() %>% 
  as.dendrogram()
```

 
```{r}
library(dendextend)
```


```{r}
# res_1_dend %>% 
#   labels()
```


```{r}
# res_1_dend %>% 
#   order.dendrogram()
```

```{r}
# (res_1 %>% 
#   exprs() %>% 
#   colnames())[28]
  
```


```{r}
res_1_dend_laborder <- res_1_dend %>% 
  labels()

```


```{r}
mycolors <- ifelse(mdata_subset[res_1_dend_laborder, ]$triple_negative_status == "TN", "forestgreen", "maroon")
```



```{r}
par(mar = c(10,2,1,1))
res_1_dend %>% 
  set("labels_cex", 0.1) %>% 
  plot()

colored_bars(colors = mycolors, dend = res_1_dend, rowLabels = "TN Status", add = TRUE)
```


```{r}
res_joint_dend_laborder <- res_joint_dend %>% 
  labels()
```


```{r}
mycolors <- ifelse(mdata_subset[res_joint_dend_laborder, ]$triple_negative_status == "TN", "forestgreen", "maroon")
```



```{r}
par(mar = c(10,2,1,1))
res_joint_dend %>% 
  set("labels_cex", 0.1) %>% 
  plot()

colored_bars(colors = mycolors, dend = res_joint_dend, rowLabels = "TN Status", add = TRUE)
```


## Using heatmaps

Function to process distance object into a distance matrix for heatmap visualization.

```{r}
get_distmat <- function(x){
  distmat <- as.matrix(x)
  colnames(distmat) <- NULL
  diag(distmat) <- NA
  return(distmat)
}
```



```{r}
row_annot <- mdata_subset %>% 
  mutate(er = factor(er), pr = factor(pr), her2 = factor(her2)) %>% 
  select(submission_date, triple_negative_status, pr, er, her2) %>% 
  rename(`TN status` = triple_negative_status)

head(row_annot)
```


```{r}
set.seed(5)
row_colours <- list( "TN status" = c("darkgoldenrod4", "darkmagenta"), 
                     "submission_date" = pal_nejm()(2),
                     "pr" = pal_lancet()(9)[1:2], 
                     "er" = pal_lancet()(9)[8:9],
                     "her2" = pal_lancet()(9)[5:7])

names(row_colours[["TN status"]]) <- as.character(unique(row_annot[["TN status"]]))
names(row_colours$pr) <- as.character(unique(row_annot$pr))
names(row_colours$er) <- as.character(unique(row_annot$er))
names(row_colours$her2) <- as.character(unique(row_annot$her2))
names(row_colours$submission_date) <- as.character(unique(row_annot$submission_date))
str(row_colours)
```
```{r}
my_colours <-  viridis(265^2, begin = 1, end = 0)
```

```{r}
res_joint_dists %>% 
  get_distmat() %>% 
pheatmap(.,
         color = my_colours,
         annotation_row = row_annot,
         annotation_colors = row_colours,
         show_colnames = F,
         show_rownames = F,
         cutree_rows = 2,
         cutree_cols = 2,
         main = str_wrap("Heatmap of sample distances for class-specific QN expression matrix for GSE76275", 60),
         legend_labels = c("small distance", "large distance"),
         legend_breaks = c(min(., na.rm = TRUE), 
                         max(., na.rm = TRUE)), 
          filename = "plots/exploration_plots/classQN_clustering_heatmap_GSE76275.png")
```


# Performing SVA

## Performing SVA on regular RMA data


```{r}
full_mod <- mdata_subset %>% 
  select(geo_accession, triple_negative_status) %>% 
  arrange(triple_negative_status) %>% 
  model.matrix(~triple_negative_status, data = .)

head(full_mod)
```


```{r}
red_mod <- model.matrix(~1, data = mdata_subset)

head(red_mod)
```

Get number of significant surrogate variables.

```{r}
n.sv.wholeQN <- num.sv(exprs(res_1), full_mod, method="leek")
```


```{r}
n.sv.wholeQN
```


```{r}
svobj.wholeQN <- sva(exprs(res_1), mod = full_mod, mod0 = red_mod, n.sv = 1)
```


```{r}
sv_df.wholeQN <- tibble("geo_accession" = colnames(exprs(res_1)), "sv" = svobj.wholeQN$sv)

head(sv_df.wholeQN)
```



```{r}
left_join(sv_df.wholeQN, mdata, by = "geo_accession") %>% 
  mutate(index = 5) %>% 
  ggplot() +
  # geom_col(mapping = aes(y = fct_reorder(geo_accession, sv, .fun = function(x){x}), x = sv, fill = set)) +
  geom_boxplot(mapping = aes(x = submission_date, y = sv, fill = set)) +
  theme_light() +
  labs(y = "Surrogate Variable Value", title = "Distribution of latent variable estimated by SVA for different grouping factors")
  

# ggsave("plots/exploration_plots/sva_grouping_normalRMA.png")
```


## Performing SVA on class-specific quantile normalized data

Create full model matrix.

```{r}
full_mod <- mdata_subset %>% 
  select(geo_accession, triple_negative_status) %>% 
  arrange(triple_negative_status) %>% 
  model.matrix(~triple_negative_status, data = .)

head(full_mod)
```

Create reduced model matrix.

```{r}
red_mod <- model.matrix(~1, data = mdata_subset)

head(red_mod)
```

Get number of significant surrogate variables.

```{r}
n.sv.classQN <- num.sv(res_joint, full_mod, method="leek")
```


```{r}
n.sv.classQN
```


Perform SVA on classQN-normalized expression matrix.

```{r}
svobj.classQN <- sva(res_joint, mod = full_mod, mod0 = red_mod, n.sv = n.sv.classQN)
```


```{r}
sv_df.classQN <- tibble("geo_accession" = colnames(res_joint), "sv" = svobj.classQN$sv)

head(sv_df.classQN)
```

```{r}
saveRDS(sv_df.classQN, "sv_df_classQN.RDS")
# sv_df.classQN <- readRDS("sv_df_classQN.RDS")
```


```{r}
sv_df.classQN <- left_join(sv_df.classQN , mdata, by = "geo_accession")
```


```{r}
sv_df.classQN %>% 
ggplot() +
  geom_boxplot(mapping = aes(x = submission_date, y = sv, fill = er)) +
  # geom_point(mapping = aes(x = submission_date, y = sv, color = er)) +
  theme_light() 
  # labs(y = "Surrogate Variable Value", title = "Distribution of latent variable estimated by SVA for different grouping factors")
  

# ggsave("plots/exploration_plots/sva_grouping_classQN.png")
```


# Trying to see if the SVA estimates a batch when QN is not applied

In this attempt, I perform no quantile normalization while performing RMA. If QN has not been performed and a surrogate variable shows up that corresponds to batch, batch effects are probably present.

```{r}
rawData.summary <- rma(rawData, background = TRUE, normalize = FALSE)
```


```{r}
rawData.summary_df_long <- rawData.summary %>% 
  exprs() %>% 
  as_tibble(rownames = "probeID") %>% 
  pivot_longer(cols = all_of(c(tnbc_samples, nontnbc_samples)), names_to = "sample_id", 
               values_to = "intensity") %>% 
  left_join(., mdata_subset, by = c("sample_id" = "geo_accession"))
```



```{r}
p3 <- rawData.summary_df_long %>% 
  ggplot() +
  geom_boxplot(mapping = aes(x = reorder(sample_id, as.numeric(set)), y = intensity, 
                             color = set)) +
  labs(x = "samples", 
       title = str_wrap("Sample-wise log2 intensity boxplots in the absence of QN", 60)) +
  scale_color_npg() +
  theme(axis.text.x = element_blank())

p3
```


```{r}
ggsave("plots/exploration_plots/GSE76275_noQN_boxplots.png", 
       p3, 
       units = "cm", width = 30, height = 10)
```

Getting the number of surrogate variables in the absence of quantile normalization.

```{r}
n.sv.nonorm <- num.sv(exprs(rawData.summary), full_mod, method="leek")
```

There is one surrogate variable present in the absence of QN.

```{r}
n.sv.nonorm
```


```{r}
svobj.nonorm <- sva(exprs(rawData.summary), mod = full_mod, mod0 = red_mod, n.sv = n.sv.nonorm)
```


```{r}
sv_df.nonorm <- tibble("geo_accession" = colnames(exprs(rawData.summary)), "sv" = svobj.nonorm$sv)

head(sv_df.nonorm)
```


```{r}
left_join(sv_df.nonorm, mdata, by = "geo_accession") %>% 
  mutate(index = 5) %>% 
  ggplot() +
  # geom_col(mapping = aes(y = fct_reorder(geo_accession, sv, .fun = function(x){x}), x = sv, fill = set)) +
  geom_boxplot(mapping = aes(x = submission_date, y = sv, fill = set)) +
  theme_light() +
  labs(y = "Surrogate Variable Value", 
       title = str_wrap("Distribution of latent variable estimated by SVA for different grouping factors", 60))

ggsave("plots/exploration_plots/sva_grouping_noQN.png")
```


```{r}

```

